1. Trailer Leaf Spring Suspension
  2. Timbren
  3. Axle Replacement System
  4. Axles
  5. Universal Fit
  6. 3500 lbs
Timbren Axle-Less Trailer Suspension System - Straight Spindle Only - 3,500 lbs

Timbren Axle-Less Trailer Suspension System - Straight Spindle Only - 3,500 lbs

Item # ASR3500S05
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Our Price: $603.13
Trailer Leaf Spring Suspension
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Timbren Trailer Leaf Spring Suspension - ASR3500S05
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The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle, allowing for maximum ground clearance and a low deck height. Suspension units replace your existing axle and operate independently. Fits any frame width. Lowest Prices for the best trailer leaf spring suspension from Timbren. Timbren Axle-Less Trailer Suspension System - Straight Spindle Only - 3,500 lbs part number ASR3500S05 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (156)
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Timbren Trailer Leaf Spring Suspension - ASR3500S05

  • Axle Replacement System
  • Axles
  • Universal Fit
  • 3500 lbs
  • Timbren
  • Spindles Only

The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle, allowing for maximum ground clearance and a low deck height. Suspension units replace your existing axle and operate independently. Fits any frame width.


Features:

  • Suspension system provides a safe, smooth, quiet ride for your trailer
    • 2 Separate units replace your existing axle
  • AEON progressive-rate main springs absorb road shock and support trailer's load
    • Deliver a smooth, stable ride, regardless of load size
    • Compress and become stiffer as load increases, boosting spring strength
  • Rebound springs act as return devices to minimize rattle and bottoming out
    • Create constant pressure on the arm, so the suspension is never completely relaxed
  • 2 Independent units can eliminate the need for a thru axle
    • Increase ground clearance
    • Lower deck height for easier loading and unloading
    • Reduce roll during cornering
    • Fit any trailer width
  • Built-in camber and toe-in help your trailer to track straight, reducing wear on the tires
  • Straight, EZ Lube spindles accept trailer hubs (sold separately)
    • EZ Lube feature makes it easy to grease bearings without removing the hub
    • Spindles can be removed from units for simple replacement if damaged
  • Heavy-duty steel construction with black powder coat finish resists wear and corrosion
  • Easy to install and align
    • Bolt or weld to your trailer's frame


Specs:

  • Fits: 1-axle and 2-axle trailers that use regular tires
    • Not recommended for triple-axle applications
  • Weight capacity: 3,500 lbs
  • Quantity: 2 suspension units without hubs
    • Works with Dexter 1,750-lb hubs (84545UC1-EZ)
  • Spindle/Hub compatibility:
    • Bearings: L68149 inner, L44649 outer
    • Races: L68111 inner, L44610 outer
    • Seal: 10-19
  • 3-Year limited warranty


Note: The Timbren Axle-Less suspension system may require additional support on your trailer. If your trailer does not have a crossmember above the spot where you want to install the Timbren system, you may need to reinforce the frame. You can accomplish this three ways. First, you can retrofit the trailer with a crossmember. Second, you can build out the trailer frame. Third, you can use standard, 2-inch steel tubing to connect the 2 Timbren suspensions together using the built-in square hole on each unit.


Ground Clearance

Ride on rubber with Timbren's Axle-Less trailer suspension system. This one-of-a-kind suspension consists of two separate units, each containing rugged steel arms and two strong, hollow rubber springs. Overall, the system safely and effectively absorbs road shock, minimizes trailer bounce and rattle - regardless of load size - and helps to protect your trailer's components and cargo. Built-in camber and toe-in keep your trailer tracking straight to minimize tire wear. Integrated hangers attach to your trailer's frame. And 2-inch holes make it easy to reinforce your trailer's frame by adding standard, 2-inch-square steel tubing (if needed).


The Axle-Less independent suspension system replaces your trailer's existing leaf spring suspension and can eliminate the need for an axle. The independent action of the suspension reduces roll when your trailer is cornering and allows you to maximize ground clearance and minimize deck height. Your trailer can have the same side-to-side clearance as your tow vehicle. And the low deck height makes it easy to load cargo from either the rear or the side.


Because you're riding on rubber, your trailer will ride smoothly and comfortably, whether you're navigating rocky terrain or highway asphalt.


Timbren Axle-Less Suspension Parts

Components

  1. The AEON progressive-rate main spring supports the weight of your trailer and cargo and easily absorbs road shock. It is constructed of heavy-duty, hollow rubber.
  2. The rebound spring minimizes trailer bounce, rattle and bottoming out. It keeps the suspension under constant tension and ensures that the main spring compresses and expands in a controlled fashion. And it delivers a smooth, stable ride - regardless of how much cargo is on the trailer.
  3. The trailing arm and integrated hanger attach the suspension to the side and bottom of the trailer frame.
  4. The control arm carries the spindle and the hub. It pivots on strong, long-lasting urethane bushings that never require lubrication.
  5. The EZ lube spindle is simple to grease. If damaged, it can be removed and replaced, saving you both time and money.
  6. The hub is not included with this model.
  7. The built-in square hole accepts standard 2-inch tubing. If there is no crossmember above the suspension, you can easily add support to your trailer's frame by inserting 2-inch steel tubing through the hole on each suspension unit and then bolting the tubing into place.

Timbren Axle-Less Suspension versus Leaf Springs

Leaf Spring Example

The Axle-Less suspension's progressive spring is a definitive upgrade over leaf springs. Although leaf springs deliver a stable ride when supporting a load, a trailer with leaf springs will bounce and rattle when it's empty or supporting a light or off-center load. On the other hand, your trailer can bottom out on bumpy roads if the load is too heavy. The AEON progressive-rate springs of the Axle-Less suspension always deliver the same reliable performance, no matter the load size. As more weight is added to the trailer, the springs compress and become stiffer, offering more support for heavy loads. And because they rebound more slowly than leaf springs, the AEON springs do a better job of absorbing road shock, thereby keeping your trailer from bouncing and rattling when you're carrying a light load. So with this versatile system you will enjoy a smooth ride whether you're towing an empty trailer or a hefty load.


Unlike leaf springs, Timbren's Axle-Less suspension units operate independently of one another. Each spring activates only when needed. This reduces roll and delivers top-notch performance, even when you're hauling off-center loads. When your trailer with leaf springs takes a turn, one side of the suspension compresses and takes on more weight, and the other side becomes looser and bounces. This causes rattle and can make the trailer lean to one side. But when your trailer with the Axle-Less suspension takes a turn, one side compresses and becomes more rigid to absorb the weight, and the other side expands to normal height to help steady the load and minimize bounce and rattle. The load stays better balanced, even if it is off-center.


Timbren Axle-Less Suspension versus Torsion Axles

Torsion Axle Example

Timbren's Axle-Less trailer suspension system is a great alternative to torsion axles. While both systems allow either side of the trailer's suspension to operate independently, only Axle-Less suspensions are actually separate units. Torsion axles still require a bar that spans the bottom of your trailer, whereas Timbren's system can eliminate the need for a thru axle - giving you the same amount of ground clearance from the front of your trailer to the rear. It also allows Axle-Less suspensions to fit any trailer width - unlike torsion axles, which have to be fitted to an exact frame width.


Axle-Less suspensions operate in a smoother, less stressful manner than torsion axles. Torsion axles use a twisting motion, where the bar inside the axle tube rolls against rubber cords or a rubber wall to create compression and resistance. The up-and-down motion of the main spring and the side-to-side motion of the rebound spring in Timbren's Axle-Less suspension work together to provide smooth, consistent compression - with no twisting - that results in a better ride and less stress on the suspension's components.


Installing the Timbren Axle-Less Suspension

Whether you are building a trailer or retrofitting your existing trailer with the Axle-Less system, you must make certain that the trailer's frame is both perfectly square and sturdy enough to support a heavy load without the aid of a thru axle.


Install Option 1

There are three ways to install the Axle-Less suspension. The easiest method, which is recommended if you are replacing axles on your trailer, is to install a piece of 2-inch-square tubing (sold separately - available at most weld shops) through the integrated hole in the Axle-Less suspension. Then all you need to do is bolt the suspension to the side of the trailer's frame with three bolts (not included).


Install Option 2

The second option for installation is to fabricate an inboard extension plate that attaches the trailer's frame to the Axle-Less suspension.


Install Option 3

The third method of installation is to bolt the Axle-Less suspension's hanger to the trailer's frame and to an existing crossmember that is in the area where you want to install the suspension.


With both the second and third options, you must use three bolts to attach the suspension to the side of the frame. And you also have to use two or three bolts to attach the suspension to the bottom of the frame extension, or crossmember. Both the second and third methods of installation will eliminate the need for a thru axle and provide the most clearance.


Measuring Diagram

Timbren's Axle-Less suspension units should be installed directly across from one another. Before mounting the units, measure back from the coupler and mark the frame to make sure that the two distance measurements (A and B) are within 1/8 inch of each other. Then you can drill holes through the frame and attach the hangers with Grade-5, half-inch bolts (not included).


Dimensions of the Timbren Axle-Less Suspension

Dimensions 1

Dimensions 2

Dimensions 3

Dimensions 4



ASR3500S05 Axleless Trailer Suspension System by Timbren - Without Hubs - Regular Tires - 3500 lbs






Customer Reviews

Timbren Axle-Less Trailer Suspension System - Straight Spindle Only - 3,500 lbs - ASR3500S05

Average Customer Rating:  4.6 out of 5 stars   (156 Customer Reviews)

The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle, allowing for maximum ground clearance and a low deck height. Suspension units replace your existing axle and operate independently. Fits any frame width.

- ASR3500S05
by:

Trailer suspension and disk brake performance is outstanding big big difference over leaf spring and electric drum brakes. Installation required modifications to the frame to monut the timbren suspension 933882



- ASR3500S05
by:

Timbren saved our RV road trip! The leafs on the axle on our 2018 Jayco TT came apart while driving in Maryland. We tried going to the manufacturer, but they were useless. Going to a RV mechanic meant being grounded for at least 2 months. Then we found Timbren. With the help of Timbren's excellent staff we purchased axle-less system through etrailer, who made sure we got as quick as possible. It came ahead of schedule, my husband installed the Timbren system and we were back on the road! The axle-less system is better than the original manufacturers. If you plan on taking your RV or TT farther than 100 miles GET THIS INSTALLED and get it through etrailer. 928178



- ASR3500S05
by:

Product was great easy to install, haven’t towed with it yet as I’m sill working on the repairs! 856120



- ASR3500S05
by:

I use these axles on off road trailer built to tackle the toughest 4x4 trails and the have held up to all the beating our customers can dish out 287244



- ASR3500S05
by:

Easy to install. Big difference in trailer's suspension and handling. Highly recommended. 282826



- ASR3500S05
by:

Great product.. My company manufactures trailers with our own axle-less suspension, however we have abandoned our own design in favor of the Timbren system. It is far superior and more cost effective to use the Timbren. Also, the Timbren can be adjusted for camber, a nice feature on a trailer. Just be sure to order the correct spindle for your application. Exchanging the spindles with etrailer became a nightmare. I eventually kept the original spindles and bought new ones from Timbren directly. 182264



- ASR5200S01
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


A little bit pricey, at first. But in the long run they are cheaper. We used to bend or break an axle every 3 or 4 months. But we have had these a couple of years now with no problems. One thing that is nice is on a tandem axle set up you can get a flat and you just have to take the wheel off and run on 3 or 2 wheels without the hubs hitting the ground. 593458



- ASR2KHDS05
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


Built a custom trailer to haul an ATV on some bad rural roads in Baja. I used the 2" drop axel-less suspension to allow for full size tires and wheels yet keep center of gravity low. Easy to install on exposed frame, but note that a required brace or 2" square steel bar may be needed and sourced on your own. The finish is not very durable and does not survive the normal bumps, wrench scrapes and scratches of installation; plan on some touch up once installed. Pay attention to the spindle clearance and wheel offset. 317250



- ASR1THDS03
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


I installed these on a small jeep style camping trailer that I built. I plated my frame and also used the suggested two inch square tubing to tie them together. It rides very well, looks like it should be very durable, it's a simple design, simple to install, more economical than other independent systems, has less parts to go bad than other systems, I would highly recommend to any body using a trailer on rough roads! 582196


Comments
We just drove 1200 miles mostly at 75mph. The axles work very well in all conditions, trailer ride very smoothly.
PhilTreeMan - 11/20/2019

63425

- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


These units install easily, are well made, and perform great! The trailer doesn't bounce around like you see a lot of trailers do while traveling down a bumpy road. I traveled some unpaved roads with no issues. I am certainly glad I went axleless. I installed with 15" tires. Problem is I didn't go big enough. I intended to install on an existing trailer that I had. Changed my mind and built a new trailer. The new trailer came in heavier than I had planned. 2k pound capacity is now too small. I have to watch what I load the trailer with so I don't over load the suspension. I intend on buying the 3500 pound units when I have the money. 289894



- A12WS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


I am pleased with the Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 1,200 lbs. I had a project and it worked out just fine. 254872



- ASR5200S01
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


Timbren Axle-Less Suspension - Spindle Only - Regular Tires - 5200 lbs Item # ASR5200S01 Looks great on empty trailer, idea is good, bad execution. When loaded tires "splay out" severely, excessive tire wear, obviously too much play in system somewhere. 584361


Comments
Excessive camber which causes wear on the portion of the tire tread closest to the trailer can be caused by a few different things. 1 The axle-less suspension system has a 5200 lb per set capacity, so youll want to be sure this amount is not being exceeded. 2 The surface of the trailer that the suspension member is added to needs to be an integral part of the trailer that should have NO give in it whatsoever. Any flexing of the side member there will throw off the camber of the tires. I have seen what you describe occur when the suspension system has been mounted to tubular steel that made up the edge of the trailer frame. In that instance, some angle iron was added to stiffen things up. 3 Its not required, but a piece of 2x3 inch tube steel of the appropriate length can be used as a beam connecting the two sides, utilizing the existing hole in the axle-less suspension member. This will help stiffen things up. 4 The suspension system should have included some shims that can be used where the spindle attaches to the suspension portion of the assembly. Using these shims can decrease the camber, but only if the points mentioned above are taken care of. Ive checked with Timbren regarding the above, and they concur.
-- Mike L - 11/21/2018

45920

- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


So far great! I used one of the Timbren Axles in a mountain trail camp/SAR trailer I just finished building. I have only had the trailer on roads because all the trails I want to try it on are still under snow...but it is melting fast. I have included a couple of photos. 612696



- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


Only axle I could find to fit my application. Very cool product. Fast delivery. Easy instructions 642073



- ASR2KHDS05
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


I was looking for a low profile axle system for my motorcycle trailer. The primary requirement was to be able to load my motorcycle by myself which required a low-profile trailer. With the 4" drop provided by Timbren, this setup turned out great. I originally intended on using ramps but after I swapped the leaf spring axle out with the Timbren, I found I was able to ride my motorcycle on/off without the need for the ramps. Originally, I was going to go axle-less but I found when torquing down the assembly to my frame it started to compress the aluminum rail. To take the pressure off the frame I added the 2" bar from axle to axle. Pulls smooth and effortlessly. I've had several people comment on the trailer height with one wanting to buy the trailer from me. This person worked at the local Honda Dealership. He thought it was a great design and I would imagine he's seen a variety of trailers come through his lot. The other option I considered was a torsion axle but I was looking for the lowest profile I could get. Therefore, cost was not a key factor. I also like the soft ride the Timbren system provides. Not sure if the torsion design would have been as smooth over bumpy roads. Regardless, I'm pleased with how this project came out. 352952


Comments
Its been a year since Ive installed the new axles on my trailer my comments above still hold true. Im very pleased with the ride quality of the system after a year. The trailer tracks true and has hauled many things other than my motorcycle. Even empty it doesnt hop around like the original stock straight axle did. No regrets on the purchase.
Pat A - 03/15/2018

35909

- A12WS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


Good product and easy to install on my new build of a off road trailer for my side by side. Thanks 628307


Comments
This has been a great product and works great and was easy to install
John V - 04/14/2020

73224

- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


I wanted to give a lot star, but I spent three months because you missed parts of me a few times. Anyway it is very good for the product. 563720



- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


I pull my Sea Doo GTX 300 (that means they are pretty heavy!) PWC's from Wisconsin to Florida twice a year. That said, this last trip to Florida caused me to bend the original straight axle on my trailer. Not fun. I ordered the Timbress Axle -less axles, and after a few hours of work on the trailer, they were installed, square and true. I immediately put the Sea Doos on the trailer to see how the trailer performs with the new axle-less system on it. one word: FANTASTIC!!!! I guarantee if I have to fix this issue again, I will use the exact same product. It is awesome! 736299



- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


This suspension system did EXACTLY what I wanted. I replaced the leaf springs, axle/hubs on my small trailer. The new suspension improved the capacity, lowered the bed 4+inches, improved ground clearance and allowed me to rebalance the trailer all WITHOUT having to have any welding done. Everything needs to be measured very exactly and the alignment technique is fairly cumbersome and takes a bit of time. In the end, I have a quiet, steady, strong, low riding trailer. What more could you ask for 517553



- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


not happy with one lug nut missing threads!!! but I think they also could supply the wedge plate! the horizontal holes never change and the lower vertical should be slots. for the money I shouldn't have to make a plate. 202996



- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


This is my favorite suspension system in all the world! Rides like an absolute dream. Easy to set up and install. Works on any trailer frame size. One thing to know: You don't get the ride height you get with a standard leaf spring suspension. Even with 15-inch wheels, the ride height is pretty low - maybe 10-12 inches of ground clearance to the bottom of the main trailer frame. If you need more ride height, get the lifted version. A few areas of possible improvement? It's difficult to bolt the suspension unit to a crossmember using the middle bolted hole, which uses a tacked-on weld nut. You have zero room for error when drilling the hole through your cross member, and you can't really use the suspension as a template. Hmmm ... also, the hanger plate mounting holes are positioned 1-inch from the bottom of the trailer frame. That makes it very difficult, since I use channel side rails, to use standard 1/2-inch USS or SAE washers on the backside. There isn't room. Just an extra 1/4 of a inch would allow me to use standard washers underneath the nuts on a channel frame. Nitpicking aside, it's amazing. 410020



- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


Received my order. Quality is very good. Intend to use on fishing shanty frame. I thought that the wire I ordered was 4-wire round, not flat. That was my preference but I guess I should have inquired prior to ordering. I feel that the quality of the flat wire could be better. All other products are very nice and I am happy. Service was excellent. Thank you 242026



- A35RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


Had a broken torsion axle on dual axle boat trailer. Manufacter six to eight weeks to replace. Got this product in week. Installed same day. Very happy .cancelled new Axel order. 263087



- ASR2KHDS03
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


Excellent, helpful customer service sold me this product, and trust me when I say it's worth the price tag. Pulled the old axle and leaf spring off a 60's era Bantam and swapped out for this with a support bar in between. Bumped up tires to 315/75r16 BFG TA/KO's to match my rig and am amazed at how much better this trailer now pulls. Empty it wad bouncing all over the place with the old axle and leaf spring setup. Now I hardly even know it's there. Was very easy to install, took a couple hours but I am happy with how it turned out. A+++ product and customer service! 172019


Comments
HI Matt,WHat size wheel did you use and which hub did you get to match?Appreciate the info
-- comment by: Conrad S - 04/01/2015

10523
Comments
They are GREAT! I put them on a small offroad trailer that has followed me all over some really rough roads in remote Oregon, Washington, and Idaho. They have performed flawlessly, helped the trailer tow extremely well, and were the single best upgrade I did to that trailer. Very much looking forward to another summer of exploring! Massive upgrade to the stock axle leaf spring combo, and I have had the opportunity to show it off to alot of fellow overlanders. I cant speak high enough of them. I also purchased a set of airbags for my vehicle which unfortunately have not held up terribly well. I have had to field repair one once already, and neither holds air terribly well. Truth be told they seem very underdesigned for the job they perform. From my super secret high tech pocket internet window.
Matt N - 02/06/2016

16696

- A20RS545
by:

Review from a similar Axle-Less in Trailer Leaf Spring Suspension


I bought these to replace an axle on an older trailer that I could not buy a replacement axle from the manufacturer. They are well made, a correct fit and the Customer service could not be better. Due to the careless handling of the shipper, a component of the product was damaged. With a simple phone call, I was able to have a replacement part shipped out that day. I would recommend everyone to shop here before going to their manufacturer! 721618


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Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • Replacement Timbren Axle-Less System and Hydraulic Brake Assembly for 3,500 lb Axles on Boat Trailer
    I would love to help you upgrade your suspension components! I am guessing that you have 3,500 lb axles on your trailer but if you could verify that it would help me to make sure that I recommend the correct parts for you. Also, are you looking to add brakes to both axles or just keep them on one pair? You would get more braking power and less wear with brakes on all of the axles but if you only want them on one then that will also play into the parts.
    view full answer...
  • Can Spindle On Timbren Axle-Less Trailer Suspension System Be Reversed
    You can reverse the mounting of the spindle mounting on the Timbren Axle-Less Trailer Suspension System, part # ASR3500S05. I verified this with my contact at Timbren. The toe-in will need to be set when installing this system and it comes with shims that allow you to adjust the camber. The installation instructions that are included explain how these adjustments are made.
    view full answer...
  • Suspension Upgrade for Torsion Axles
    I do have an option for you but the Lippert Components Center Point by Trailair Air-Ride Suspension Upgrade part # LC1565401 is for leaf spring axles only and cannot be used with a torsion axle setup. If you are experiencing a rough ride then most likely the rubber inside your torsion axle has become worn and it will need to be replaced. This would be a good time to upgrade to an axle-less system as well, the Timbren Axle-Less Trailer Suspension System. The Axle-Less Trailer Suspension...
    view full answer...
  • Replacement for Lippert 3,500 Lb LCI35-SB-85-68.5 Axle
    I do have options for you but we would not have a direct replacement for your 3,500 Lb Lippert Axle. Instead, we have the Timbren Axle-Less Trailer Suspension System part # ASR3500S05 or part # ASR3500S06 which as the title states is an axle-less style that replaces the leaf springs as well with rubber bumpers that work to support the trailers weight and reduce road shock better than a standard steel leaf spring. The Timbren Axle-Less Trailer Suspension System is also very easy to install...
    view full answer...
  • Could Dexter 3,500 lb Axle be Replaced with Timbren Axle Less Kit ASR3500S05
    If you have 3,500 lb axles currently that aren't getting overloaded you could replace them with the part # ASR3500S05 and it would work well. You have to be sure that you never exceed 3,500 lbs though. We can't ever recommend you tow your trailer with these installed over 3,500 lbs.
    view full answer...
  • Recommended Axle Upgrade from Dexter Torflex # 9 for 6 on 5-1/2 Inch Hub Compatibility
    I reached out to Dexter to confirm the proper hubs for a # 9 axle. There are not any 6 bolt options available from any of our manufacturers that fit your spindles. We have 5 on 4-1/2 inch like you already have and 4 on 4 inch bolt pattern only for your size spindle. If you desire to upgrade to the 6 on 5-1/2 inch, I recommend replacing your axles. If you go with the Timbren Axle-less System like # ASR3500S05, then you can use the Dexter Trailer Hub and Drum Assembly for 3,500-lb...
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  • Dimension Drawing for the Timbren Axle-Less Suspension System # ASR3500S05
    I attached a picture that shows all of the dimensions of the Timbren Axle-Less Suspension System, # ASR3500S05 that you are interested in. Since I don't know much about your setup the best recommendation I can make would be for you to check out the dimensions I attached and if you decide you do need a 4 inch drop you would want the part # ASR3500S04 instead.
    view full answer...
  • How To Convert A Torsion Axle To An Axle-Less Or Straight Axle System
    I do have a few options available for you however, we currently do not sell torsion axles. You have two options to consider for your trailer, the Timbren axle-less suspension and the Dexter straight axles. As you have a gross trailer weight (GTW) of 3,000 lbs. I recommend using a 3,500 lb setup. The Timbren System will provide you with a much easier method for converting from torsion springs in addition to containing fewer components. I recommend the Timbren Axle-Less Trailer Suspension...
    view full answer...
  • How to Determine Correct Timbren Axle-Less Suspension for Boat Trailer
    In order to determine the correct capacity of the Timbren Axle-Less Suspension you need for your dual axle boat trailer you just need to know the GVWR of your trailer or the capacity of your current axles to get the appropriate system. For example, based on the numbers you gave it seems likely you have a pair of 3,500 axles so you will replace those with 3,500 lb rated axle-less suspension systems. For that you can use the Timbren Axle-Less Trailer Suspension System - Straight Spindle...
    view full answer...
  • Parts Needed to Replace a 3,500 lb Axle with 5 on 5 Inch Hubs
    I do have an option for you but we do not have a standard straight axle in the 59-1/2" spring center and 73-1/2" hub face measurements that you provided. Instead, I recommend taking a look at the Timbren Axle-Less Trailer Suspension System part # ASR3500S05 with the Trailer Idler Hub Assembly part # AKIHUB-550-35-EZ-K. This system will actually replace the axle and suspension with a system that uses rubber aeon springs that will both minimize road shock and improve the trailer's ability...
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  • Axle, Hubs and Electric Brakes for Converting Old Military Trailer
    We offer beam axles rated for 3500-lbs as well as axle-less suspension systems from Timbren such as their # ASR3500S05. The advantages of these Timbren systems include a lower trailer deck height and increased ground clearance. The bolt or weld right to your trailer's frame On this kit you can install hub/drums # AKHD-655-35-EZ-K which have the 6-on-5-1/2 bolt pattern and with them use self-adjusting electric drum brakes # AKEBRK-35L-SA (left) and # AKEBRK-35R-SA (right). Use 10-gauge...
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  • Replacement Axle Recommendations For 2001 Logan Horse Trailer
    I called my contact at Dexter and they sent me the information about your axle. It is a 3,500 lb torsion axle with electric brakes and a hub with a 6 on 5-1/2 bolt pattern. We do not carry this axle so if you are looking for an exact replacement you may need to find a local retailer that can get this for you. We do offer axle-less systems that can be used to replace your axle. I recommend part # ASR3500S05. This will fit any width trailer and features independent suspension and...
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  • Replacement Axles Needed for a 1966 Avion Holiday Travel Trailer
    The best solution that we have for you is to use the Timbren Axle-Less Trailer Suspension. These come with built-in rubber suspension that ease the installation process and work independently of each other for the best trailer ride out there. Typically for a tandem axle setup you will have two 3,500 lb axles or two 5,200 lb axles. We have these Timbrens in both weight ratings as parts # ASR3500S05 and # ASR5200S01 respectively. If you are looking for standard trailer axles then...
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  • What Height is Recommended When Setting the Fender Height Above the Trailer Tire?
    The Timbren Axle-Less Trailer Suspension System - Straight Spindle Only - 3,500 lbs # ASR3500S05 has a deflection of 1-3/4 inches. I've attached a photo to assist. We recommend 4 inches above the tire in most cases for fender mounting to account for deflection and any road debris to not damage the tire or fender. That is based on a leaf spring system that will have slightly more deflection than the Timbren system, but it is a good reference and what I would use.
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  • Replacing 3,000 Pound Torsion Axles with Timbren Axle-Less System on Dual Axle Trailer
    Replacing the torsion axles on your trailer with the Timbren Axle-Less Suspension System is a great idea. For your 6,000 pound GVWR trailer you will indeed want to go with two 3,500 pound assemblies. The Timbren Axle-Less Trailer Suspension System # ASR3500S05 that you were looking at will work perfectly. When the units are installed the center of the spindle is going to sit exactly 2-13/16 inches from the bottom of the trailer frame, which will just give you a tiny bit more ground...
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  • Can Timbren Axle Less System Have Hubs with 5 on 5 inch Bolt Pattern
    In order to use idler hubs that have a 5 on 5 bolt pattern you would have to use Timbren Axle-Less system # ASR3500S05. Then you could add 2 of hub # 84550UC1-EZ.
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  • Recommended Replacement Axle for 1973 Yarbrough Single Axle Trailer
    I do have a solution for you, but unfortunately we do not have any trailer axles with those dimensions. What we do have, which is actually an upgrade from any regular axle, are our Timbren Rubber Spring Suspension systems. One of the best things about the Timbren option is that they are much easier to install than a standard axle, plus they provide extra ground clearance due to the design. You can choose to get one with just a spindle, like part # ASR3500S05, with an idler hub, like...
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  • Recommended 3,500 Pound Timbren Axle-Less System with Disc Brakes
    Starting with the Timbren Axle-Less System, I recommend the Timbren Suspension System # ASR3500S05. This system features two independent units with straight spindles and a 3,500 pound capacity. It does include brake mounting flanges that can work with both electric or hydraulic disc brakes like what you are wanting to do. I have attached an installation video on this system that you can take a look at. Then, for a disc brake kit that will work perfectly with the Timbren system,...
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  • Recommended Timbren Axle-Less Suspension System for 2017 Forest River Surveyor
    Installing the Timbren Axle-Less Trailer Suspension System on your trailer is a great idea. I recommend sticking with a 3,500 pound system to match what you currently have. While the axle is typically the primary factor when it comes to determining a trailer's overall capacity, it is not the only component that contributes to its limit. The hubs, wheels, frame itself, etc will all work to establish the trailer's listed limits. This simply means that replacing the 3,500 pound axles on your...
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  • Upgrading to 3,500 Axle on Overloaded Boat Trailer
    It sounds like you are already aware of this but overloading your trailer has most likely bent the spindles and is now causing the trailer tires to wear faster on the inside edge which is subsequently leading to blow outs. The fix for this is as you mentioned to upgrade to a higher capacity axle. If this is the fix you choose to partake then you will want to change out the leaf springs as well. The reason for this is because leaf springs will more or less be rated for the axle capacity....
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  • Availability of Lift and Drop Versions of Timbren 3,500 lb Axle Less System
    We do have the 3,500 lb Timbren Axle Less kits in a few different variations. I attached a link to a page that has all of them listed but for a 4 inch lift for off-road (wider) tires we have the part # ASR35HDS02, 4 inch lift for standard tires part # ASR3500S06. For a 4 inch drop like you mentioned we have the part # ASR3500S04. Current pricing is available below at the product links.
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  • What is Considered Normal Tire Size for Use with Timbren Axle Less Kit # ASR3500S05
    Standard trailer tire widths will work great on the Timbren Axle Less kit part # ASR3500S05 since this wasn't designed for wider or off road tires. The Westlake ST205/75R15 part # LHAW120 would work great. If you were wanting to go with a wider size like you mentioned 235/75 R15 A/T that's when the part # ASR35HDS02 would be a good idea as it has the wider wheel spacing.
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  • Replacing Torsion Axles with Timbren Axle-less System on a Trailer Used to Make Tear Trailer
    The axle on the trailer you are going to purchase is probably a 3,500 pound axle. To determine if the Dexter hubs will fit the spindles on the Timbren Axle-less system # ASR3500S05 we need to know the inner and outer bearing numbers stamped into the sides of the bearings. They are likely going to be L68149 for the inner and L44649 for the outer. If they are then the hubs will fit the Timbren system. But I do recommend going ahead and getting brakes on the trailer because the laws for...
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  • 3,500 lb Timbren Axle Less Setup with 5 on 5 inch Bolt Pattern
    In order to use idler hubs that have a 5 on 5 bolt pattern you would have to use 3500 Timbren Axle-Less system # ASR3500S05. Then you could add 2 of hub # 84550UC1-EZ.
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  • Hubs for Timbren Axle-Less Suspension for Use in Salt Water Environment
    Timbren's axle-less trailer suspension systems like # ASR3500S05 are all made with a heavy powder coat finish but it is possible to select matching galvanized idler hubs like # AKIHUB-545-35-G-EZ-K or galvanized hub/drums like # 8-247-50UC3-EZ. Both fit the spindles on this Timbren kit and both have the 5-on-4-1/2 wheel bolt pattern. If you don't mind spending more we also have a stainless steel idler hub from Kodiak, part # KH84545S. All hubs that fit the Timbren kit appear on the linked...
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  • Replacement Suspension Options For A 1967 Dual Axle Silver Streak
    To replace the leaf spring on your 1967 Dual Axle Silver Streak trailer you need to know the length of the leaf spring from center of one eye to the center of the other eye. Leaf springs tend to flatten out over time so take into consideration the springs may be about a half inch longer than they were originally. If the leaf spring is a slipper spring you can measure from the center of the eye at the end of the spring to the tip of the slipper spring. You also need to know the weight capacity...
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  • Recommended Axle-Less System to Replace Odd Spindle Sizes of Current Axle
    For your older trailer, I recommend getting new axles due to your non-standard spindle measurements. I recommend the Timbren Axle-Less Trailer Suspension System - Straight Spindle Only - 3,500 lbs # ASR3500S05 which will have idler hubs # AKIHUB-555-35-EZ-K that match your bolt pattern available. These can be used in tandem applications and will replace the leaf spring suspension on your trailer as well. You can add trailer brakes to these assemblies if you desire as they do have the...
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  • Timbren Axle-Less Trailer Suspension System 3,500 lb Axle for Off Road Tires and Straight Spindle
    For the straight spindle, 3,500 lb axle version of the Timbren Axle Less system that was designed for the wider off-road tires you'd want the part # ASR35HDS01.
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  • Replacement Axle for Dexter Axle with LN152363825 On It
    I do have a replacement axle option available for you, but you are correct that we do not have a traditional axle replacement for your current setup. I spoke with my contact at Dexter Axle who gave me some information on the 3,500-lb axle that you have with the part number LN152363825 on it. It uses the Inner Bearing # L68149, the Outer Bearing # L44649, and the Grease Seal # RG06-050. This is consistent with our Timbren Axle-Less Suspension Axle part # ASR3500S05 so you would be able...
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  • Option for Axle On Homemade Trailer
    We have an option for you, but do not have any axles of the size you mentioned. The best option we have is the Timbren Axle-Less Suspension System, which are simply bolted or welded so you do not have to worry about finding an axle that meets any specific measurements. You only need to know the capacity you need; for example the 3,500 lb Timbren Axle-Less Trailer Suspension System # ASR3500S05, 5,200 lb system # ASR5200S01, or 7,000 lb system # TASR7KS01. I've added links to some...
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Info for this part was:

Expert Research:
Michael H
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Expert Research:
Adam R
Expert Research:
Jeffrey L
Installed by:
Jeff D
Installed by:
Randy B
Written by:
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Video Edited:
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Video Edited:
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Updated by:
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