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  1. Trailer Axles
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  4. Universal Fit
  5. Rubber Spring Suspension
  6. 5 on 4-1/2
Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2

Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2

Item # A35RD545
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Our Price: $959.51
Trailer Axles
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Timbren Trailer Axles - A35RD545
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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 axles from Timbren. Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2 part number A35RD545 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - A35RD545

  • 3500 lbs
  • Universal Fit
  • Rubber Spring Suspension
  • 5 on 4-1/2
  • Idler Hubs
  • Timbren
  • Easy Lube Spindles

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 with hubs accept any 5-bolt wheels with regular tires
    • 4" Drop provides lower ground clearance
    • Spindles can be easily removed from units for simple replacement if damaged
    • Bearings, races and seals are included with hub
  • 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
  • Bolt pattern: 5 on 4-1/2"
  • Weight capacity: 3,500 lbs
  • Quantity: 2 suspension units with hubs
  • 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 accepts any 5-bolt wheel that has a low-pressure, regular tire.
  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 sandwiches 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


A35RD545 Axleless Trailer Suspension System by Timbren - 4" Drop Spindle - Hubs with 5 Studs on 4-1/2" Bolt Circle - Regular Tires - 3500 lbs

ASR3500S04 Timbren Axle-Less 3500S, P019 Outboard Arm 4" Drop Spindle w/ Brake Flange

88545_2 3500 lb Idler Hubs - 545 1/2" Stud - Qty 2






Customer Reviews

Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2 - A35RD545

Average Customer Rating:  4.7 out of 5 stars   (208 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.

by:

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!!!



by:

Good heavy duty product


Comments
Axles work great
Jason m - 08/13/2016


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Review from a similar Axle-Less Suspension in Trailer Axles


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.


Comments
Actually over a year, and still working great.
dale - 04/22/2022

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Review from a similar Axle-Less Suspension in Trailer Axles


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

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Review from a similar Axle-Less Suspension in Trailer Axles


Needed a suspension system that I could make a low profile kayak trailer, that would fit in a specific area next to my garage. These were excellent that I could make the trailer any width I wanted. Easy to install and well made.



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Review from a similar Axle-Less Suspension in Trailer Axles


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

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Review from a similar Axle-Less Suspension in Trailer Axles


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

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Review from a similar Axle-Less Suspension in Trailer Axles


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)



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Review from a similar Axle-Less Suspension in Trailer Axles


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

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Review from a similar Axle-Less Suspension in Trailer Axles


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.



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Review from a similar Axle-Less Suspension in Trailer Axles


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


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Review from a similar Axle-Less Suspension in Trailer Axles


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.



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Review from a similar Axle-Less Suspension in Trailer Axles


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

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Review from a similar Axle-Less Suspension in Trailer Axles


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

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Review from a similar Axle-Less Suspension in Trailer Axles


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


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Review from a similar Axle-Less Suspension in Trailer Axles


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.



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Review from a similar Axle-Less Suspension in Trailer Axles


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.



by:

Review from a similar Axle-Less Suspension in Trailer Axles


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.



by:

Review from a similar Axle-Less Suspension in Trailer Axles


We use Timbren's ASR3500S06 on all of our XER trailers. We couldn't be happier. It is a well built suspension.



by:

Review from a similar Axle-Less Suspension in Trailer Axles


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...



by:

Review from a similar Axle-Less Suspension in Trailer Axles


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



by:

Review from a similar Axle-Less Suspension in Trailer Axles


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



by:

Review from a similar Axle-Less Suspension in Trailer Axles


revolutionary. i will never go back to a standard axle ever again. great ride and performance regardless of loading. no need for separate shocks is a real game changer too.


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Ask the Experts about this Timbren Trailer Axles



  • Recommended Axle-Less Trailer Suspension With Drop Spindle For Older Coachman Camper
    We have axle-less systems that are designed with a drop spindle but we do not offer a standard axle with a drop as you said you have on your trailer. We Have axle-less systems like part # A35RD545E that has electric brake hubs and has a 4-inch drop spindle. The bearings, races, and seals are included and the wheel bolt pattern is 5 on 4-1/2. For an axle-less system with idler hubs and a 4-inch drop spindle I recommend part # A35RD545. Both of these systems have a 3,500-lb weight capacity.
    view full answer...
  • Availability of Trailer Axles with Drop
    The dropped axle option is the single most popular option for tiny house trailers made by tinyhouse basics, according to their website. This feature allows a 4-inch lower deck height for more interior headroom and easier entry. We do offer the axle-less Timbren trailer suspension kits that offer drop. Examples include the 3500-lb-rated Timbren kit # A35RD545E which features electric brakes with 5-on-4-1/2 hub/drums and the idler hub kit # A35RD545. These suspension kits bolt (or weld)...
    view full answer...
  • Trailer Height When Using Timbren Axle-less System with 4 Inch Drop
    The exact height of the deck will depend on other factors with your trailer. However, I can tell you that the spindles of the Timbren Axle-less System # A35RD545 sit pretty much at even height as the location where they connect to a trailer's frame. Knowing that, if you know the tire size you'll be using and divide it in half you'll know the height the spindles will be off the ground. We can factor in that the weight of the trailer on the Timbrens will cause them to ride slightly lower...
    view full answer...
  • Can Timbren Axle-Less Trailer Suspension System be Used in Place of Torsion Axles on Travel Trailer
    Yes, you could use the Timbren Axle-Less system # A35RD545 in place of straight axles on your travel trailer. This system basically works similarly to torsion axles with the suspension built in. Since this system is rated for 3,500 pounds though you would likely notice a stiffer ride since the trailer will not weigh enough to compress the suspension the way it does with the two 2,500 pound axles. I have included a link to all of the Timbren systems we carry. The system you referenced...
    view full answer...
  • Will the Timbren Axle-Less Suspension System Work on an Aluminum I-Beam Boat Trailer
    You may be able to use the Timbren Axle-Less Suspension System, # A35RD545, on your aluminum boat trailer as long as you can find a way to bolt it to the frame. The frame brackets for the Timbren Axle-Less systems bolt to the outboard side and bottom of the frame rail. You will need to weld an aluminum plate to the outboard side of the frame for the side bolt holes and you will want to make sure the bolts for the bottom of the frame will not hit the center web of the frame. The underside...
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  • Troubleshooting Incorrect Wheel Alignment on Timbren Axle-Less Trailer Suspension System
    I reached out to Timbren and they suggest making sure you used the shims provided with the # A35RD545 between the outboard arm and the spindle arm. More than likely this is the reason for your wheels tilting in at the top on each side. If that does not fix the problem please feel free to reach out and I will help you troubleshoot further.
    view full answer...
  • 3,500 lb Timbren Axle-Less Suspension System With Drop For Small Camper
    It sounds like what you are needing is a Timbren Axle-Less Suspension System that has a drop spindle on it in order to have a low clearance to fit in your garage. We do have options for you, both of which have a 4 inch drop, 3,500 lb capacity and come with either an idler hub or a hub and drum. - Timbren Axle-Less Trailer Suspension System with Hubs - 4" Drop Spindle # A35RD545 - Timbren Axle-Less Trailer Suspension System with Electric Brake Hubs - 4" Drop Spindle # A35RD545E I have...
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  • Which Timbren Axle-Less Suspension for 3500lb Capacity Low-Deck Car Hauler
    The Timbren Axle-Less suspension system is a good choice. They offer a 4 inch drop spindle model, part # A35RD545 includes idler hubs and # A35RD545E includes electric brake hub drums. These are good for a total 3500 lb capacity, which includes the weight of the vehicle and the trailer. This would be a good option for a car carrying trailer with a low deck height. At rest, the center of the spindle would sit even with the bottom of the trailer frame, and at maximum deflection, the center...
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  • Available Timbren Axle-Less Suspension System Rated For 3,500 Pounds
    We have two Timbren, 3,500 pound systems with idler hubs, the Timbren Axle-Less Trailer Suspension System with Hubs - Strait Spindle - 5 on 4-1/2 # A35RS545 and the Timbren Axle-Less Trailer Suspension with Hubs - 4 Inch Drop Spindle - 5 on 4-1/2 # A35RD545. Both of these systems are designed to mount wheels that have a 5 on 4-1/2 bolt pattern. Both the # A35RS545and the # A35RD545 have 3,500 pound weight capacities and feature EZ-Lube Spindles. When choosing tires and wheels for your...
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  • Suspension and Tire/Wheel Upgrade Needed for a 3,500 lb Trailer Axle
    If you already have the axles installed then I would need to know the size of your hub as well as the bolt pattern on your hub as well to make a recommendation. I have attached a helpful article on bolt patterns for you to reference. If you don't know the diameter of your hub just let me know what the weight capacity is and I should be able to help you from there.
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  • Available Timbren Axle-Less Brake System With 3500-lb Capacity For Trailer
    We do not offer torsion axles, but we do have axle-less Timbren axles that have built-n suspension. The great thing about these systems is they can be used on any width trailer since they bolt right to the trailer frame. I have attached a link to the axle-less systems we offer that you can check out. Some of the systems have a drop spindle like part # A35RD545E. These are great for trailers with a lower deck height. This system has electric brake hubs already included.
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  • Hub Face Measurement for Tire Clearance on 3,500 Pound Timbren Axle-Less Trailer Suspension System
    The Timbren systems that include brakes do not have parking brakes. The electric drum brakes included are Axletek. The 6 inch measurement from the hub face to the hangers of the system is accurate for the # A35RD545E system you're looking at.
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  • Recommendation To Replace Straight Axles On Trailer For Lower Ground Clearance
    Since your straight axles are too tall for your application, you can use shorter hangers for your current axles and springs. If that won't get you the clearance you need, I recommend replacing your axle with the Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs # A35RD545E. This will give you the suspension, brakes, and lower your trailer. If you need a larger capacity let me know. This system has EZ lube spindles and the 4 inch drop provides...
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  • What To Do With A Bent Torsion Axle
    This would all depend on where the bend is located. If the torsion bar that connects the frame brackets together is bent, then you would need to buy a new axle. However, if the spindle on the torsion axle is bent, you can replace it. To prevent other malfunctions, I recommend using one of our Timbren Axle-Less System systems as they work independently of one another in addition to being an easy replacement option for most torsion axles. I have attached a list of all our Timbren systems...
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  • How to Measure to Determine Wheel Bolt Pattern
    You can refer to the linked article for illustration of how to measure a hub's bolt pattern. If there is an ODD number of lugs, as with a 5-on-4-1/2-inch wheel, measure from the center of one lug to a point halfway between the two lugs directly opposite on the bolt circle, as shown in the linked photo. The Timbren axle-less suspension kit you referenced, part # A35RD545E, includes hubs with the 5-on-4-1/2 bolt pattern.
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  • Suspension Travel of Timbren Axle-Less Suspension # A35RD545E
    You'd need to use a minimum of a 14 inch wheel with the # A35RD545E Timbren Axle-Less Trailer Suspension System. The brake drums recess into the wheel to a degree, and the drums wouldn't fit with a wheel smaller than 14 inches. There are brake drums that are smaller in diameter, but they wouldn't be compatible with the spindles used on any of the Timbren axle/suspension options. According to Timbren, the rubber spring allows for 1-3/4 inches of deflection. You'll want to position the axle...
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  • Do the Electric Brakes Come with Timbren 3.5K Axle-Less Trailer Suspension System # A35RD545E
    Yes, the Timbren Axle-Less Trailer Suspension System # A35RD545E does include the actual brake assemblies as well as the hub and drum assemblies. The Timbren systems are great if you're looking for a better, independent suspension for the trailer or more ground clearance beneath the trailer.
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  • Mounting Dimensions of the 3,500 lb Timbren Axle-Less Suspension System # A35RD545E
    I have attached a top view photo with additional dimensions that should be helpful. As you may already know, this system will have 1-3/4 inches of deflection under a full load. If you are using fenders, I recommend placing the fenders 3 inches above the tires at full deflection for maximum bump clearance.
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  • How Far Does the Suspension Travel on the Timbren A35RD545E
    The deflection (or amount the suspension can travel), for the Timbren part # A35RD545E that you referenced is 1-3/4 inches. I attached a picture that shows this dimension as well.
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  • Timbren Axle-Less Suspension for a Deck Over Enclosed Trailer
    As long as there is the proper space on the trailer frame, you can install a Timbren Axle-Less suspension system such as # A35RD545E. I have included a picture that shows the relevant mounting dimensions and bolt pattern so you can determine if it is going to work with your trailer design.
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  • Tire Clearance on Fabricated Trailer Using Timbren Axle-Less Trailer Suspension # A35RD545E
    The overall diameter of a 15-inch tire will range from 27.1-inches for a 205/75-15 size to 28.4-inches for a 225/75-15 size. The linked article offers a table with tire dimensions. The standard deflection of the Timbren 3500-lb system # A35RD545E with a static load (sitting still in the driveway) is 2-5/8-inches according to my contact at Timbren. It was suggested that to this you add several more inches of clearance to allow for the effects of bumps. You will need to use the overall...
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  • Troubleshooting Squealing Trailer Brakes
    You could have drum brakes or disc brakes on your 2008 Forest River Wildcat trailer. Which if you have disc brakes it could be that you need to put the brake pad lube on the pads. I wish we carried this but we do not. Auto parts stores should have this. For drum brakes typically squealing is caused by dust in the drums. The solution would be to remove the drum and clean the assemblies. Cheap brake linings can cause this problem as well.
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  • Can Timbren Axle-Less Systems be Used In Tandem for a Tandem Axle Trailer
    Yes, you can use Timbren Axle-Less Systems like the part # A35RD545E that you referenced for a tandem axle setup. You cannot use this setup for a triple axle though.
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  • Weight Capacity for Timbren Axle-Less Trailer Suspension System # A35RD545E on Tandem Axle Trailer
    Each of the two hub/suspension assemblies in the Timbren Axle-Less Trailer Suspension System # A35RD545E is rated for 1750 lbs so together they offer the 3,500 lb weight capacity. When using two systems for a tandem/double axle application, you will have a total weight capacity of 7,000 lbs.
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