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  1. Trailer Leaf Spring Suspension
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Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle Only - 3,500 lbs

Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle Only - 3,500 lbs

Item # ASR3500S04
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Our Price: $915.22
Trailer Leaf Spring Suspension
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Shipping Weight: 50 lbs
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The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle. Suspension units replace your existing axle and operate independently. The 4" drop spindle allows for a low deck height. Fits any frame width. Lowest Prices for the best trailer leaf spring suspension from Timbren. Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle Only - 3,500 lbs part number ASR3500S04 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Timbren Trailer Leaf Spring Suspension - ASR3500S04

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

The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle. Suspension units replace your existing axle and operate independently. The 4" drop spindle allows for a low deck height. 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
  • 4" Drop, EZ Lube spindles accept trailer hubs (sold separately)
    • 4" Drop provides lower ground clearance
    • Spindles can be easily 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, 4" drop spindle (straight model shown) 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

The following diagrams show measurements that were taken with electric drum brakes installed on the Timbren Axle-less suspension system.


Dimensions 1

Dimensions 2

Dimensions 3

Dimensions 4



ASR3500S04 Axleless Trailer Suspension System by Timbren - 4" Drop Spindle - Without Hubs - Regular Tires - 3500 lbs

Installation Details ASR3500S04 Installation instructionsAlternate Instructions ASR3500S04 Installation instructions




Customer Reviews

Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle Only - 3,500 lbs - ASR3500S04

Average Customer Rating:  4.7 out of 5 stars   (195 Customer Reviews)

The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle. Suspension units replace your existing axle and operate independently. The 4" drop spindle allows for a low deck height. Fits any frame width.

- ASR3500S04
by:

Very nice quality, I had to call Timbren with a question very good company to deal with and etrailer is a first class company very good customer service.



- ASR3500S04
by:

My trailer is an enclosed race car carrier originally built with dual axles and leaf springs. The maximum weight of the trailer and load would be about 5,000lb. This Timbren product is well engineered, well constructed and does what it is designed to do. Much better system than the dual axle, leaf spring set up. Installation may me a bit more complicated than the videos or supplied directions indicate. Look at the videos and directions and your trailer and plan ahead. Take measurements, decide on how to reinforce the frame and buy high quality hardware if you plan on bolting everything together. This Timbren product would be a great choice if you were building a trailer from scratch. Choosing to convert an existing trailer suspension is a more complicated choice. For me it was worth the effort.



- ASR3500S04
by:

Product looks great. I had to some leg work to get shipping moved along but otherwise satisfied.



- ASR3500S04
by:

Packaging very good and shipping fast. Excellent communication and shipment was tracked by company representative.



- ASR3500S05
by:

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


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


Comments
The Timbren axle less suspension and Disk brake and disk brake controller system is still work great. will never go back to drum brakes or leaf spring axle suspension.
Quintin - 01/06/2022


- TASR7KS02
by:

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


They have more pros than cons, but the second set I bought broke the flat plate that holds the spindle at about 8 months. The steel quality seemed less than I would expect since it basically peeled it back like a pop can as you can see in the pictures. Otherwise I like the clearance and ride. They last 2-3 years where the torsion axles I replaced would wear out in 4 months after driving down rough gravel roads. There is a grade zerk on the underside which I didn't realize until I bought the second set. That would have helped the first set last longer had I known about it.


Comments
The Timbren Axle-Less Trailer Suspension - 4 Spindle w Brake Flange - Regular Tires - 7K Part # TASR7KS02 has a 3-year limited warranty. I will have Customer Service reach out to you.
-- Etrailer Expert Thomas M - 12/22/2021


- A20RS545
by:

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


I used these axles in a different way than most would. I needed a trailer that was small, could handle tight switch-backs, carry 600 lbs and be light. I had this idea and as a retired design engineer I saw a great possibility in this axle. I have made four of these trailers now, one as a camp trailer, 2 for trail work for State Parks and one as a utility trailer.


Comments
Really cool work!
-- Etrailer Expert Sierra K - 07/07/2021


- ASR3500S06
by:

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


The trailer rides great down the road and no more worries about saltwater and rusty leaf springs. Not a cheap option but I’m very happy with the setup. When installing, just be sure to measure accurately and have sharp drill bits. A drill press type of guide also helps ensure correct drilling angles. The first picture is of a mounting gusset a local welding shop made. One is needed for each side and necessary to provide needed mounting strength-at least on my trailer frame. Pics 2 and 3 show the mounted suspension on one side of the trailer. Pic 4 shows the suspension on one side of the trailer with the axle attached and a separately purchased disc brake assembly mounted on it. Finally, pic 5 shows a 2” box channel between both suspension assemblies. Independent suspensions would have been nice, but I wanted to ensure trailer rigidity was maintained. So, after one year, so far, so good. It’s all smooth sailing down the highway.



- A20RS545
by:

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


I am not a mechanic so Brandi was real helpful. Had to get some professional help to remove the old suspension and install the new suspension. The only drawback we ran into was the spindle did not extend out far enough to mount the tires in the normal way. We had to put the tires on backwards. It all worked out beautifully. Towed the trailer for over 1700 miles without any problems. Brandi was delightful to talk with and very patient with me. Her help was most appreciated. Sorry, I didn't take any pictures.


Comments
good
R C - 12/19/2021


- TASR5200S03
by:

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


Very exicited about these axels, I have been eyeing these for over a year. (Excellent service from etrailer, they had my parts to me in 1 day from the time of placing the order.) These axles seem to be well made and fit nicely with the Dexter hub and drum assembly and the 12" electric brake kit. I installed this all on a M1101/M1102 trailer frame after removing the factory axel assembly. I have not ran these on the road or off as of yet but will give another review at that time. The fit and finish are great and the packaging was good, a little banged up from shipping (missing 1 washer)



- ASR3500S06
by:

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


A must have suspension if you're building an off-road trailer!


Comments
Its been a year and this suspension is still doing great!
David R - 09/27/2021


- TASR5200S03
by:

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


This is as close to a bulletproof suspension as they come. We use this suspension on all of our VORSHEER XOC trailers. They have performed flawlessly as an off-road suspension.



- ASR3500S05
by:

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


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.



- A35RS545
by:

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


I rebuilt a 4 x 8 trailer using the Timbren Axle-Less Trailer Leaf Spring Suspension and it works great. I would recommend it to others.


Comments
Working out just fine.
David J - 09/25/2020


- TASR5200S03
by:

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


I installed these on my single axle travel trailer to replace the axle and leaf springs. Weight savings was a wash with the required steel tube for added stability. I installed on an I-Beam using aluminum plate as a spacer. It took my friend and I 3 days to install everything. The hardest part was rerouting my black pipe propane line. I also had to install it just back of center due to a steel cross beam being in the way of the middle bolt hole. I replaced the brakes and hubs as well as the wheels to match the new hubs. Overall we've been super happy with this upgrade. The trailer rides a lot smoother. I'm not finding random screws on the floor after a long bump ride. We decided to do this after our leaf spring broke 2 times, 12k miles between. We were done dealing with a subpar suspension. I probably would not recommend doing this if your leaf springs are working for you. We put a lot of miles on our trailer. We aren't weekend campers.



- ASR3500S06
by:

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


Best suspension you can get for off-road trailers. We use this suspension on all of our VORSHEER XER trailers.



- ASR35HDS05
by:

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


Fast service from etrailer sending me my Timbren kit. They are always very helpful. Unfortunately it looks like UPS mishandled one of the 3 boxes and had to re-tape it all over. I just rcv'd the shipment, so I will have to open the box when I get home and make sure everything is inside. This is no fault of etrailer, just the shipping companies these days.


Comments
I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 11/21/2021


- A12WS545
by:

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


Purchased 2 sets of the Timbren 1200 Axle-less systems for upgrading the suspension on an older 30' ft glider trailer. Single axle with small (13") tires made towing tough due to porpoising, dragging on drive entrances do to poor flotation; also German made and metric, no repair parts. GVW 2000 lbs equated to bouncy ride. Dual sets now allow the trailer to ride over bumps and sharp inclines easily, smoothly, little bounce on country roads; porpoising is history. My glider now rides securely, safely, quietly. Install time 4 1/2 hours (includes head-scratching). Results are outstanding, units are totally solid. Recommend the square tube interconnect, easy and quick - trailer frame was on the light side, so a precautionary fix. Clean look underneath. Ordered 5 wheels w/tires, very nice. Helpful neighbor so impressed he ordered a HD single set for his new DIY snowmobile trailer. Customer satisfaction 100%, from phone order, online support, product information, immediate shipping, install instructions, followup... HIGHLY RECOMMENDED!


Comments
I have just a little more to add regarding my purchase: Two sets, of the Timbren Axle-less assemblies, 1200 lb, and 5 wheels. I placed the order via phone, and whoever was on-call that day provided great answers and recommendations regarding the units, wheels and tires. At 31 feet, the trailer originally exhibited amplified porpoising on any bumps or dips in the road. Also bouncing and occasional sideways tipping due to the single axle. It made a lot of noise on my mountain community washboards. I speculated that the Timbren units would solve most, if not all of these problems and they have. Installation on my older 31 ft European ie, metric and no longer manufactured glider trailer was a mere 4.5 hours from removal of the old single axle to setting the trailer back down on its new assemblies. Instructions are complete, precise, useful and helpful. Appreciated. Little to comment on as installation was all straight-forward. I would like to describe the maiden voyage to the airport and back, but there is nothing to tell, other than it towed beautifully proper alignment instructions, and all that I viewed from the rear view mirror looked like a magic carpet ride. It rides over washboards and pot holes like a marathon hurdler, the 4-wheel independent suspension is great. Packaging: the shipping boxes all arrived in good condition, but the cardboard component boxes inside them... not so much. Most were ripped and open due to heavy components lightly surrounded with brown packing paper, just token amounts. Parts: all was accounted for minus a pair of spindle axle washers for one set, easily replaced at the local farm and ranch supply. No squawk, just an fyi. I am very pleased with your product and support, and was happy to leave a 5-star review with photos. The upgraded suspension was also a topic this past weekend at the glider port by those who regularly trailer their ships to various soaring events, some as far as a thousand miles away. My compliments to eTrailers, hope you can use my info,
-- comment by: Kelly F - 11/28/2018



- A4WS440
by:

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


Pleased with ETRAILER, will order here again. Not as happy with the torsion axle setup. 2 inch square opening for tying both axles together with your own 2" square tubing are not shaped to match 2x2x1/8 tubing. Grinding and welding of tubing required to make it fit. Also found the overslung stub axle left the end of the pivot arm without much ground clearance though the unit was intended and spec'd for atv tire off road use. A pivot arm with mounting pads top and bottom would be better and allow the user to choose high or low clearance use. I found the units were perfectly suited to offroad use once I fabricated new mounting pads and welded them to the bottom of the arms.


Comments
After a year of off road use, I couldnt be happier. My trailer rides smooth loaded or unloaded. No of that bunny hopp with leaf springs or rigid mount axles. The small rebound control snubber works perfectly! I modified my components for high clearance but the concept is sound, they work well. Great job Timbren!
Doug F - 06/22/2017



- ASR1200S04
by:

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


The order came in on time and the customer service at etrailer.com (Ashley) and Sean from Tmbren was outstanding. They both were very helpful in my choosing the right product for my needs. The axle less suspension's performance is absolutely superb. It vastly improves ride quality. I am using it on a teardrop camper that often goes on gravel roads and the raddling sound from the leaf axles was horrible. A couple of points to consider before you settle on the axle less suspension: keep in mind that you will lose some hight of the trailer. While you will gain clearance from the lack of the axle, the suspension will make the trailer sit lower than before.i had to lower my hitch by an inch to maintain the trailer leveled. Also it does appear to compress at higher rate than the leaf springs, which makes it softer but easier to reach it's limit. Overall this product is absolutely a must if you are looking to improve the safety and the quality of your towing.



- ASR1THDS01
by:

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


After a great deal of research, I ultimately chose the Timbren long arm kit to replace the torsion axle under my teardrop trailer. My initial impression is that there is simply no comparison between the two. It now rides better, pulls better and handles better than I could have imagined. The Timbren axle system is incredibly well built and is much more confidence-inspiring. While the spring rate closely matches my trailer weight, the components are much more rugged and robust. The spindles, bearings and brakes are rated at double the capacity of my old axle which gives me great peace of mind. I pull my trailer, both on and off road, anywhere it will fit and the long travel and heavier components are a game-changer for my travels. Installation, while requiring a bit of forethought, was otherwise straightforward and methodical. Documentation available from etrailer and Timbren, is second to none. Instructions were clear and concise with drawings and detail taking the major guesswork out of the equation. Even though, due to the odd frame design of my trailer that required a bit of work to adapt, I ended up making some frame stiffeners, the adaptation was as simple as it could possibly be. I've ordered from etrailer in the past and they were 100% accurate on this order as well. I ordered the Timbren kit without backing plates and hubs due to the requirements of my trailer and etrailer suggested, explained availability and supplied all of the components I needed. They truly a stress-less bunch of folks with an extraordinary website. I'll no doubt turn to them again...



- ASR3500S06
by:

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


You guys are awesome! Great how to vi deos.


Comments
Great
Zac - 12/08/2021


- A20RS545
by:

Review from a similar Axle-Less Suspension 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.



- A35RD545
by:

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


enclosed are pics of trailer and spindle units. I was very happy with the end result, lowering ez loader trailer 8 inches for hovercraft. the spindle units were well made, very strong but had some weld repairs as pictures show.i could not set the needed adjustments till I cleaned up the units with a stone and file. also please improve the packaging . these heavy units need something better than cardboard for shipping. they were dislodged from Styrofoam and partially poked holes thru cardboard. but fortunately no damage there. again im happy with the installation.thank you!!!



- ASR1200S02
by:

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


It was a very straight forward install, it goes pretty smooth if you take your time, double check your layout, Make sure of your bolt sizes (length) before going to the store. If you plan the project, don’t rush, its not a race, it goes really good. I spent about 10 hours spread over two days by myself. I am just waiting for tires to arrive. All that said very happy with the product and etrailer. Will recommend for any axel/suspension replacement.


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Ask the Experts about this Timbren Trailer Leaf Spring Suspension



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  • What Replacement Dexter Axle And Hub Do I Need
    I am able to get you setup with something that will work for you. Based on my research and after speaking with a representative from Dexter I was able to get some information about your existing axle. The specs for your axle are as follows: rated for 3,500 lbs hub face length of 85" 4" drop spindle spring center 70". We do not offer a direct replacement for this axle. The Dexter axle that is closest to what you need is the Dexter Trailer Axle Beam w/ Idler Hubs - 4" Drop - E-Z Lube -...
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  • Hubs with 5 on 5 Bolt Pattern that Will Fit a Timbren Axle-Less Suspension System
    There are Timbren axle-less suspension systems that do not come with hubs so that you could add your own such as # AKIHUB-550-35-EZ-K. But the hubs with 5 on 5 bolt patterns that would also fit a Timbren system only accept up to 15 inch wheels. The other issue is that vehicle wheels are not meant to be used on trailers and often have an offset (mounting surface of wheel not in the dead center of the wheel) whereas most trailers take wheels with a zero offset. With that said the hub listed...
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  • Replacing Torsion Axle with Timbren Axle-Less Suspension System on Boat Trailer
    You can definitely replace the torsion axle on your trailer with a Timbren Axle-Less Trailer Suspension System like the 3,500 pound # ASR3500S04 referenced in your question. Since you will be replacing your axle, the easiest way to install this system will be to install a piece of 2-inch-square tubing through the integrated hole in the Axle-Less suspension. Then you will just need to bolt the suspension to the side of the trailer's frame with three bolts. You will just need to make sure...
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  • Adding Axle-Less Suspension System on a 1979 Avion Travel Trailer With Existing Axles
    In order to potentially add a Timbren Axle-Less suspension system to your 1979 Avion travel trailer, there are few things to consider: Adding an Axle-Less system will most likely require extensive modification of your trailer and re-aligning of your current axles. The reason you will need to modify your travel trailer is because the wheel well is not large enough to accommodate a third axle. It's also necessary to re-align your axles because the center point of the axles will change from...
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  • How to Select Axle for Fabricating Car Hauler Trailer with GVWR of 2200-lbs
    We do not sell torsion axles but they will carry a weight capacity rating just like leaf spring beam axles, which we do offer. A torsion axle can be used continuously up to its rated capacity so long as there is no deterioration to the rubber cords inside it. This can be tough to determine visually but if you can see ANY of the cord exposed (due to "torsion creep") then the axle is done and should be replaced. For a trailer that will have a gross loaded weight of 2200-lbs you could use...
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  • Timbren Axle-Less Suspension System Compatibility with Aluminum I-Beam Trailer Frame
    The Timbren Heavy-Duty Axle-Less Trailer Suspension - 4" Lift Spindle - Off-Road Tires - 3,500 lbs # ASR35HDS02 is compatible with I-beam frames and in tandem axle configuration. Due to the Aluminum frame, I recommend putting a thin rubber pad between the steel mount and the aluminum I-beam. The powder coat on the steel should keep the two dissimilar metals from galvanic corrosion, but a thin rubber pad would drastically increase this safety. Zinc plated hardware will work well with...
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  • Can a Leaf Spring Axle be Replaced by a Timbren Axle-Less System?
    Yes, you can replace a leaf-spring axle with a torsion axle on trailers. I would give you a recommendation but unfortunately we do not carry torsion axles. Just be sure you replace your current axle with one that has the same weight capacity.
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  • Correct Timbren Silent Ride Suspension System for a [email protected] Tear Trailer
    According to my research, your [email protected] trailer has torsion axles which means the Timbren Silent Ride Suspension System like part # TSR3500S05 will not be a good fit for you. Instead, you will want to use the Timbren Heavy-Duty Axle-Less Trailer Suspension part # ASR35HDS02. This kit will replace the torsion axles you have now and provide up to a 4" lift and the ability to run larger off-road tires. For a compatible hub you will also need the Dexter Trailer Idler Hub Assembly part # 42865-KIT.
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  • How Long Is a 3500-lb Axle for a 5 x 10-Foot Utility Trailer
    All of the 3500-lb-rated trailer axles that we offer are 89-inches in length from hub face to hub face and have spring seats at a 74-inch spacing. Your 3500-lb axle may be different so you'll want to measure your hub face and spring seat dimensions. All such axles are shown on the link provided for you. We offer kits with hubs or without, with electric brakes or without and even axle-less suspensions like the Timbren # ASR3500S04. The unique suspension systems do not require an axle beam...
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  • Replacement Brakes and Hubs for a Vintage Trailer with Warner Brakes
    Unfortunately, we do not have the 14” diameter x 2” wide braking assemblies you need for your trailer. I also did some searching online and could not find any replacement parts for you either. The only option I can offer you would be to replace with a more common size. In order to do so I would need you to measure your brake mounting flange bolt pattern in addition to your inner bearing, outer bearing, and grease seal. I have attached a help article on how to measure the bearing/seals for...
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  • How to Stop Squeaking, Noisy Suspension on a 7,000 Pound Travel Trailer
    What you could do is replace the suspension with the Timbren Silent Ride Suspension # TSR7000T04 for 2-3/8 inch diameter round axles or # TSR7000T05 for 3 inch diameter round axles. These will allow you to retain the axles you have and replace the steel suspension with rubber suspension. Either system is rated for 7,000 pounds total. Another option to reduce or possibly eliminate the noise from the suspension is to use 2 sets of Timbren Axle-Less system # ASR3500S05. These will replace...
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  • Can Timbren Axle-Less Suspension be Used for a Boat Trailer/Marine Applications
    You can use Timbren Axle-Less suspension for marine applications. But you would need 3500 pound kit # ASR3500S05. If attaching brakes you would need hydraulic brakes and not electric brakes. For a hub and drum assembly you could use # 8-247-50UC3-EZ which is a galvanized model for corrosion resistance. It has a 5 on 4-1/2 bolt pattern For compatible brake assemblies use # 23-312 for the left and # 23-313 for the right. Then you would need a brake actuating coupler, see link to the right...
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  • How To Lower a Trailer 3 Inches
    I am not really sure what the dealership was referring to as a 22 axle but we do have options for you to lower your trailer. The first option if you have a leaf spring axle is an over/under kit like the Dexter Trailer Springs Over-Under Conversion Kit part # K71-384-00 or part # K71-385-00 but this would only work if your leaf springs are over the axle, not under. If your leaf springs are already under the axle then the next best option would be to replace the axle with one that has a drop...
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  • Can Disc Brakes be Added to the Timbren Axle-Less Suspension Systems
    The 3,500 lb weight capacity of the Timbren Axle-Less Trailer Suspension System, # A35RD545E, is the weight capacity for the pair, not per side. Disc brakes can be used with the Timbren Axle-Less Suspension systems, however, Timbren does not offer an axle-less suspension kit with disc brakes. If you want to use disc brakes, I recommend buying the Axle-Less Suspension System - 3,500 lbs, # ASR3500S04, and the Kodiak Disc Brake Kit - 3,500 lbs, # K2HR35D. Buying the Timbren Axle-Less Suspension...
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  • Timbren Axle-Less Suspension System for Off-Road Tear Camper
    There is a lot to unpack here so I'll try address your concerns as best I can. First, you should not use a spacer of any kind to ensure your wheels fit; this would cause potential installation issues with the overall assembly not to mention void the warranties on each of the products you are looking at. The problem is if you need 8 inches to the hub face like what you get with the Timbren Heavy-Duty Axle-Less Trailer Suspension # ASR35HDS01. If this is a requirement for your wheels and...
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  • Recommended Hubs for Timbren 3,500 Lb Drop Axle-Less System with 5 on 4-3/4 Inch Bolt Pattern
    The Trailer Idler Hub Assembly part # AKIHUB-5475-35-EZ-K is compatible with the Timbren Axle-Less Trailer Suspension System part # ASR3500S04 and has the 5 on 4-3/4" bolt pattern you are after. If you want to add brakes you would need the Trailer Hub and Drum Assembly part # AKHD-5475-35-EZ-K and Electric Trailer Brake Kit part # AKEBRK-35-SA instead. Also, the Mounting Hardware for 10" Brake Assemblies part # BRKH10B would be needed if adding brakes. The Timbren Axle-Less Trailer Suspension...
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  • Replacement 3500 Pound Axle for Basstracker V17 Boat Trailer
    The closest axle we have to fit your measurements is the Dexter Axle # T3584F-EZ-8974. This has a hub face of 89 inches, spring center of 74 inches, 3500 pound capacity and EZ-Lube Spindles. It is not a drop axle like yours is currently. To gain the drop you can use the Timbren Axle-Less System with 4 inch Drop # ASR3500S04. The axle-less systems provide a suspension without the traditional cross tube axle.
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  • How Far Does the Timbren Axle-Less Trailer System Drop When the Trailer is Raised
    I spoke to my contact at Timbren and he informed me that if you were to jack up a trailer with a Timbren Axle-Less Trailer Suspension System # ASR3500S04 installed it would only drop as much as the suspension system had compressed from the weight of the trailer. The rubber spring is attached at the bottom and top of the assembly so it would not just swing down when the load was removed.
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  • Recommended Hubs and Hydraulic Brakes for Timbren 3,500 Pound Axle-Less System # ASR3500S04
    For hub drums that will work perfectly with the Timbren 3,500 Axle-Less System # ASR3500S04 referenced in your question I recommend the etrailer.com # AKHD-5475-35-K. These hubs are compatible with the spindles on the Timbren system and their 5 on 4-3/4 inch bolt pattern will fit your existing wheels. Then for hydraulic brake assemblies that will work with these hubs I recommend the etrailer.com # AKUBRK-35R for the Right Side and # AKFBBRK-35L for the Left Side. These particular assemblies...
    view full answer...


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