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 - 4" Lift Spindle - Regular Tires - 3,500 lbs

Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - Regular Tires - 3,500 lbs

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Our Price: $677.29
Trailer Leaf Spring Suspension
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Timbren Universal Fit Trailer Leaf Spring Suspension - ASR3500S06
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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 - 4" Lift Spindle - Regular Tires - 3,500 lbs part number ASR3500S06 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (143)
  • Q & A (72)
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  • Why etrailer?

Timbren Trailer Leaf Spring Suspension

  • 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
  • 4" Lift, EZ Lube spindles accept trailer hubs (sold separately)
    • 4" Lift provides greater ground clearance
    • 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 or 84656UC3-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

Frame Dimension



ASR3500S06 Axleless Trailer Suspension System by Timbren - Without Hubs - Regular Tires - 3500 lbs

Item # ASR3500S06






Customer Reviews

Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - Regular Tires - 3,500 lbs - ASR3500S06

Average Customer Rating:  4.6 out of 5 stars   (143 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.

- ASR3500S06
by:

The suspension I ordered is of high quality and I received it sooner than I expected , its good to do business with a company that produces its products so fast. 271528



- ASR3500S06
by:

Only been driving around on the axle-less system for about a week now and it has far exceeded expectations. I get better gas mileage, my trailer now sits like it was intended to, my trailer doesn't bounce like it used to, I wouldn't trade this axle system for any other. Just wish I would have known which outboard assembly arm my trailer needed with the axle-less system before I placed my order. Still not a problem though, plan on using the wrong outboard arm to build a different trailer. So far, a great product! 208571



- ASR3500S06
by:

A must have suspension if you're building an off-road trailer! 891979



- ASR3500S06
by:

These are going on a single axle trailer. They appear to be heavy duty and well made. The shipping was quick. 846207



- ASR3500S06
by:

Wow. Solid build. 830902



- ASR3500S06
by:

Everything was delivered ahead of schedule and met the expectations provided by the sales person. 794052



- ASR3500S06
by:

works great, only had one discrepancy, on a long trip part of the rubber on one side of the trailer worked its way out, it was repaired and hasn't given us any other problems. 310812



- ASR3500S06
by:

These are quality. Excellent ride height and clearance. Turns your ordinary trailer into a bulletproof beast. 168158



- ASR3500S06
by:

Everything arrived in great shape and included easy to follow installation instructions. 161958



- 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



- 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



- A35RD545E
by:

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


Extremely good product. Rides much better than traditional leaf springs. Ordering. A 7,000lb 8 lug set for the big trailer. 593860



- 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

- 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

- 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



- 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

- 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



- 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



- ASR2KHDS02
by:

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


Great looking parts, robust design, professional looking welds....Nothing missing... I contacted Timbren prior to my purchase and received a prompt, helpful reply... The supplied instructions are complete and straight forward, i'm confident should i have any issues, contacting them will get them resolved... 286117



- 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

- 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



- A12WS545
by:

Review from a similar Axle-Less 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! 580744


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

46128

- 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



- 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


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


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Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • What Wheel and Brake Sizes Work With Timbren Axle-Less System ASR3500S06
    It is possible the Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - 3,500 lbs # ASR3500S06 will work with your wheels and brakes, but it depends on a couple of factors: the bolt pattern of your wheels and the size of your brake assemblies. The hub and drum that fit this system is the Dexter Trailer Hub and Drum Assembly # 84656UC3-EZ, and let's talk about brakes first. This is a 10" diameter x 2-1/4" wide drum which means those are the size of brakes it will work with,...
    view full answer...
  • Hub/Drums and Brake Assemblies to Use with Timbren Axle Less # ASR3500S06
    We can help you get all of the parts you need to have brakes and hubs with the Timbren Axle Less kit part # ASR3500S06 but we don't have it all as one kit. You'd need the hub and drum kit part # 84656UC3-EZ and then for brake assemblies you'd want the part # 23-468-469 and you'd be set.
    view full answer...
  • How to Raise a 2005 Jayco Jay Feather 18F
    I do have an option for you but there would be no way to lift your trailer using your existing half torsion axle system as they just don't make anything to allow for this. The only option you have to raise the trailer would be to install a new system with built-in lift like the Timbren Axle-Less Trailer Suspension System part # ASR3500S06 which will retain the same torsion axle design and install in a very similar fashion which you can see in the attached install video. This will be the...
    view full answer...
  • Timbren Axle-Less Suspension System Compatible with Jeep for Matching Trailer
    For the Timbren Axle-Less kit compatible with the bolt pattern of 5 on 5 like a Jeep, you would need the 2,200 lb capacity # ASR1THDS03. The spindles on the Timbren system are a little larger than their thru-axle counterparts, so the 3,500 lbs # ASR3500S06 will only fit larger hubs that won't have the bolt pattern you seek. Using # ASR1THDS03, you can then use the Trailer Idler Hub Assembly for 3,500-lb E-Z Lube Axles - 5 on 5 # AKIHUB-550-35-EZ-K or the Trailer Hub and Drum Assembly...
    view full answer...
  • Recommended Timbren Axle-Less Suspension with 4 Inch Lift and 5 on 5 Bolt Pattern for Jeep Trailer
    The Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - Regular Tires - 3,500 lbs # ASR3500S06 is what you would want to start. If you will be using off-road or wide tires, then you will want # ASR35HDS02 instead. Then you will use hubs that have the # L68149 inner bearing and # L44649 outer bearing. For your 5 on 5 bolt pattern I recommend the Dexter Trailer Idler Hub Assembly for 3,500-lb E-Z Lube Axles - 5 on 5 - Pre-Greased # 84550UC1-EZ or the etrailer.com # AKIHUB-550-35-EZ-K....
    view full answer...
  • How To Add Larger Tires to a 2016 Coachmen Forest River Clipper Pop Up Camper For Use Off-Road
    The correct Timbren Axle-Less Trailer Suspension for you is going to be part # ASR3500S06 because it offers the 4" lift that you will need to clear larger tires on your pop-up camper. It looks like the wheels on your 2018 Subaru Outback Wagon have a 5x115mm bolt pattern which is the same as 5 on 4-1/2" so you will be able to reuse the hubs/drums and braking assemblies you have now.
    view full answer...
  • Availability of Dexter Axle with 45 Degree Drop to Add Ground Clearance to Trailer
    I may have a solution for you, however we do not currently have any standard Dexter axles available that feature the kind of spindle lift you are looking for. I instead recommend looking into an Axle-Less System from Timbren, which can eliminate the need for an axle altogether. We do have systems available, such as the 3,500 Pound # ASR3500S06, that feature a 4 inch lift to provide improved ground clearance. I have attached a short video demonstration on this system so you can get a...
    view full answer...
  • Dimensions of 3,500 lb Axle-Less Trailer Suspension System
    The dimensions - which you can see in the accompanying photo - are accurate for both systems. The # ASR3500S06 has a 4 inch lift spindle but the dimensions of the unit are the same as # A35RS545 which has a straight spindle; it also has idler hubs with a 5 on 4-1/2" bolt pattern. The other difference is that # ASR3500S06 has no hubs and but will work with hub and drum assembly # 84656UC3-EZ or idler hub assembly # 84545UC1-EZ. I've added links to video reviews of these parts for you...
    view full answer...
  • Recommended Timbren 3,500 Axle-Less System with 4 Inch Lift Spindle for Lance Trailer
    The only real difference between the Timbren Heavy-Duty Axle-Less Trailer Suspension with 4" Lift Spindle - 3,500 # ASR35HDS05 and the standard Timbren # ASR3500S06 is that the Heavy-Duty model features a larger spindle that would accommodate larger hubs and wheels. I am not sure why Timbren would have suggested the Heavy-Duty model for your application but the standard Timbren # ASR3500S06 features the capacity you need, the lift you are wanting, and would allow you to retain the use...
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  • 3,500 lb Timbren Setup Recommendation for Off-Road Wheels and Tires
    For a wheel and tire that big your best option would be the Timbren kit part # ASR35HDS02 which is set up for wider tires and also has a 4 inch lift built into it. This is the same 3,500 lb capacity though. That being said we can only safely recommend using trailer rated wheels and tires wit this kit. For just a hub without a drum you would want the part # AKIHUB-655-6-K.
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  • 3,500 lb Timbren Axle Less System Recommendation for Trailer with 4 inch Lift
    Yes, we do carry a Timbren Axle Less system that has a 3,500 lb capacity and a 4 inch lift. For that you'd want the part # ASR3500S06. This is a great axle solution for a trailer and it really doesn't have a downside. You'll get a smoother ride, longer lasting suspension components and better ground clearance.
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  • Fit & Compatibility of Timbren Axle-Less Suspension w/4" Lift & Electric Brakes on 1962 Airstream
    It sounds like you might have a 1962 Globe Trotter Airstream Travel Trailer. According to my research this has a dry weight of 2,770lbs and a hitch weight of 400lbs hitch ball height of 19.5 If the 3,500lbs weight capacity will work for your loaded Airtstream, then the Timbren axle-less system # ASR3500S06 could be just what your looking for. Since this hasn't been installed on this trailer before here are the dimensions you will need to check to determine if this system will work...
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  • Timbrens Suspension Enhancement Recommendation for Trailer with 7,000 lb Axles
    Timbren makes a 7,000 lb capacity kit designed specifically for trailer axles like yours as part # TTRA1032 but we do not have a way for you to adapt your truck's Timbrens to your trailer.
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  • Smallest Rim and Tire Combo to Use with the Timbren Axle-Less Trailer Suspension # ASR3500S06
    As long as I am understanding you correctly I believe I have a solution for you. Sounds like you want to use the smallest overall size wheel and tire you can fit on the Timbren Axle-Less Trailer Suspension # ASR3500S06. What really matters is overall wheel size and not just rim size so bear with me since there are no 10 inch rim options that would work for you. A 13 inch wheel is the smallest you can go with that will allow everything to work. For that I would recommend the wheel and...
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  • Amount of Drop on Timbren Axle-Less Suspension Systems for 3500 Pound Trailers
    When I search the Timbren site for # ASR3500S06 the description states the following: 3500lbs Axle-Less trailer suspension with 4? lift and regular spindle arms with brake flange. This matches what we have. The issue is not the spindle location relative to the trailer frame. It is the amount of drop in the spindle. When I search for # ASR3500S05 on the Timbren site the description reads: 3500lbs Axle-Less trailer suspension with regular spindle arms with brake flange. No measurement...
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  • 3.5K Axle Upgrade for Off-Road Trailer
    To upgrade your axles to 3,500 lbs I recommend the Timbren Axle-Less Suspension System # ASR3500S06. This system has a 4 inch lift that will help to give you ground clearance when you go offroad. The etrailer.com Trailer Hub and Drum Assembly, part # AKHD-550-35-EZ-K, is compatible with this axle-less system and will give you that 5 on 5 bolt pattern that you were asking about. Keep in mind that your trailer weight capacity is limited by your lowest rated piece of equipment. Even...
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  • Will Timbren Axle-Less Suspension System Provide Enough Clearance for ST175/80R13 Tire Size
    To determine if you will have enough clearance for an ST175/80R13 tire size on your Floe trailer you will need to check the space around the tire installation point. An ST175/80R13 tire measures just under 7-inches wide x just over 24-inches in diameter. Since there is 6-inches from the hub face to the frame mounting bracket on the Timbren kit this tire will fit. You'll also need to account for the normal deflection of the Timbren rubber suspension, which is typically up to 1-3/4-inches...
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  • Will I Gain Ground Clearance By Replacing Standard Axles With Timbren Axle-Less Suspension?
    The Timbren Axle-Less Trailer Suspension Systems rated at 3,500 lbs, like part # ASR3500S06, are available with straight spindles, 4 inch lift spindles, or 4 inch drop spindles. These axle's are equipped with 4 bolt electric brake flanges. The Timbren Axle-Less System rated a 7,000 lbs are only available with straight spindles, part # TASR7KS01 or 4 inch drop spindles part # TASR7KS02. The 7,000 lbs axle system does not have a lift spindle option. The Timbren Axle-Less straight spindle...
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  • Timbren Axle Less System and Hub with 5 on 5 inch Bolt Pattern Recommendation
    First thing you will need to know to determine the correct Timbren system will be the total axle capacity you would need for your trailer. We have ones that range from 1,200 lbs up to 7,000 lbs. We don't have a ton of hubs with a 5 on 5 inch bolt pattern, but if you went with a 3,500 lb Timbren system like part # ASR3500S06 you could use the part # 84556UC3 for a hub/drum or part # 84550BX for just a hub. The # ASR3500S06 has a 4 inch lift built into it so it would be great for an...
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  • Timbren Axle-Less Suspension Kits with 4-Inches of Lift
    The Timbren axle-less suspension kits are offered in either 4-on-4 or 5-on-4-1/2 bolt patterns; none is available with a 8-on-6-1/2 pattern idler hubs. All such kits are shown on the linked page. Several of these 3500-lb kits, parts # ASR3500S06, # ASR35HDS05 and # ASR35HDS02, offer the 4-inches of lift you want and come without hubs. You can use an idler hub or a hub/drum that takes the same inner and outer bearings.
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  • Comparing Timbren Axle-Less Suspension Kits for Regular Tires vs. Off-Road Tires
    The 3500-lb Timbren axle-less suspension kits # ASR3500S06 (regular tires) and # ASR35HDS01 (off-road tires) differ in that the kit for wider off-road tires provides a 2-inch greater distance from the mounting point on the trailer frame to the hub face. This 8-inch distance versus the 6-inches for the regular tire kit means wider off-road tires will have the necessary clearance to avoid contacting the trailer frame. The linked image for off-road kit # ASR35HDS01 shows the wider 8-inch...
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  • Solution to Promote Clearance for Towing a Trailer Off-Road
    I have never head of anything like that but I guess it isn't out of the realm of possibilities. You'd just have to make sure that your trailer frame is lifted high enough that these tires don't touch the ground if that's what you're going for. A potential issue I see is that this would be heavy enough that they may act as a counter-weight to your trailer tongue and cause the tongue weight to not be heavy enough which can result in poor trailer handling. When you were describing your...
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  • Will Timbren Axle-Less Suspension Fit a 2000 Prowler 5th Wheel Trailer
    If your trailer has just 2 regular 3,500 pound axles now then using Timbren Axle-Less system # ASR3500S06 is an option. It is not recommended though for triple axle applications. The hubs you have now might fit. They will need to use inner bearing L68149 and outer bearing L44649 and a seal with a 1.719 inch inner diameter to fit the spindles on this system. If you need to also replace the hub/drum assemblies then you can use # 84546UC3-EZ. You can go to a larger size tire and wheel...
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  • 2020 Aliner Expedition Suspension Upgrade for Dexter 3,500 lb Torsion Axle
    Based on the specifications that Dexter gave me for your axle, your axle is a 3,500 lbs torsion axle. We do not carry torsion axles, so the best upgrade for your trailer would be an axle-less suspension system. The axle-less system will be far easier to install and set up compared to a traditional straight-axle and leaf spring suspension system. It also provides more ground clearance and better ride quality. Since there is no axle connecting them, it allows the springs to absorb road shock...
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  • Timbren Axle Less System Recommendation for Off Road Trailer with 5 on 5 inch Bolt Pattern
    We don't have a ton of hubs with a 5 on 5 inch bolt pattern, but if you went with a 3,500 lb Timbren system like part # ASR3500S06 you could use the part # 84556UC3 for a hub/drum or part # 84550BX for just a hub. The # ASR3500S06 has a 4 inch lift built into it so it would be great for an offroad trailer.
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  • Options to Provide Lift on 1967 Aristocrat Lo Liner
    While it is feasible, it is not the recommended way to add lift. Instead, what you can do is replace your hangers with longer ones, or go with a Timbren axle-less system. You will get 4" of lift by using # ASR3500S06, which has a capacity of 3,500 lbs, or a similar unit to replace your axle's capacity. I've added a link to our selection of hangers as well as each of our Timbren systems for you to take a look at.
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  • 5 on 5 Bolt Pattern Hub and Drum Recommendation for the Timbren Axle-Less System # ASR3500S06
    All you would need is the correct 5 on 5 inch bolt pattern hub/drums and brake assemblies to go along with the Timbren Axle-Less Trailer Suspension System # ASR3500S06 and you would be good to go. For a hub with the correct capacity and bolt pattern that would fit the spindles of the # ASR3500S06 you would want the Trailer Hub and Drum Assembly # 84556UC3. I attached an install video for you to check out. For brake assemblies you would want the part # 23-26 for the left hand side...
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  • Timbren Axle Less Suspension System Recommendation for Older Aliner Camper
    For a 3,500 lb Timbren axle with a 4 inch lift built into it we have the part # ASR3500S06 which would be a great option without knowing more about your setup though it's hard to give a more detailed recommendation.
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Info for this part was:

Expert Research:
Jackie C
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Written by:
DeAnne T
Video Edited:
Jacob T
Video Edited:
Kathleen M
Updated by:
Adele M
Updated by:
Kristina F
Installed by:
Randy B
Video by:
Zach D

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