1. Trailer Leaf Spring Suspension
  2. Timbren
  3. Axle Replacement System
  4. Axles
  5. Universal Fit
  6. 1200 lbs
Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 lbs

Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 lbs

Item # A12RS440
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Our Price: $576.80
Trailer Leaf Spring Suspension
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Shipping Weight: 74 lbs
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A12RS440 - 4 on 4 Inch Hub Timbren Axles
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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 with Hubs - 4 on 4 - Regular Tires - 1,200 lbs part number A12RS440 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (150)
  • Q & A (34)
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  • Why etrailer?

Timbren Trailer Leaf Spring Suspension - A12RS440

  • Axle Replacement System
  • Axles
  • Universal Fit
  • 1200 lbs
  • Timbren
  • 4 on 4 Inch Hub

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


Features:

  • Suspension system provides a safe, smooth, quiet ride for your trailer
    • 2 Separate units replace your existing axle
  • AEON progressive-rate main springs absorb road shock and support trailer's load
    • Deliver a smooth, stable ride, regardless of load size
    • Compress and become stiffer as load increases, boosting spring strength
  • Rebound springs act as return devices to minimize rattle and bottoming out
    • Create constant pressure on the arm, so the suspension is never completely relaxed
  • 2 Independent units can eliminate the need for a thru axle
    • Increase ground clearance
    • Lower deck height for easier loading and unloading
    • Reduce roll during cornering
    • Fit any trailer width
  • Built-in camber and toe-in help your trailer to track straight, reducing wear on the tires
  • Straight, EZ Lube spindles with hubs accept any 4-bolt wheels with regular tires
    • EZ Lube feature makes it easy to grease bearings without removing the hub
    • 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: 4 on 4"
  • Weight capacity: 1,200 lbs
  • Quantity: 2 suspension units with hubs
  • Spindle/Hub compatibility:
    • Bearings: L44649 inner/outer
    • Races: L44610 inner/outer
    • Seal: 10-60
  • 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 accepts any 4-bolt wheel (5-bolt model shown) that has a 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 attaches the trailer's frame to the Axle-Less suspension.


Install Option 3

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


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


Measuring Diagram

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


Dimensions of the Timbren Axle-Less Suspension

Dimensions 1

Dimensions 2

Dimensions 3

Dimensions 4

ASR1200S02 Axleless Trailer Suspension System by Timbren - Without Hubs - Regular Tires - 1200 lbs

88440-2 Timbren Idler Hub 440 1/2" Stud - Qty 2






Customer Reviews

Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 lbs - A12RS440

Average Customer Rating:  4.6 out of 5 stars   (150 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.

- A12RS440
by:

Shipped fast. Parts look good. 224135



- ASR5200S01
by:

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


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



- ASR2KHDS05
by:

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


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



- 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

- A12WS545
by:

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


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



- ASR5200S01
by:

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


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


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

45920

- A20RS545
by:

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


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



- ASR2KHDS05
by:

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


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


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

35909

- A12WS545
by:

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


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


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

73224

- 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



- 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



- 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



- ASR3500S06
by:

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


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



- 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

- ASR3500S06
by:

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


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



- A20RS545
by:

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


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



- A20RS545
by:

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


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



- ASR2KHDS04
by:

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


I think their axle-less design is very clever. The build quality of the suspension part looks good. I have heartburn over the spindle build quality. The spindle is mounted to the suspension and then the trailer wheel mounts on the spindle. The spindles I received are warped from welding. The plate that bolts onto the suspension does not mount flat due to this warping. I called Timbren. The gentleman that helped me was very pleasant. I described the problems and he said he would check his inventory and call me back. He did call me back and said they are all like that. He said get out the grinder and fix what you can and just tighten the bolts super tight, maybe the gap will go away. Really? Wow. The other problems are a LOT of weld spatter where the bolts are supposed to fit and they made a bend in the plate too close to the bolt holes so two bolt heads hit the bend and dont fit flat against the part they are supposed to hold together. Yikes! I am taking the spindles to a machine shop to fix them but I would not have ordered this Timbren stuff had I been warned before hand. So, fair warning. 100490


Comments
Your comments regarding the Axle-Less Suspension are greatly appreciated. To address the issues you have pointed out, we have carefully reviewed our assembly. While we did not come across any major issues, we did however discover a few areas where the quality could be improved, specifically in the areas you brought to our attention. The following improvements have been made to improve the manufacturing process: - Robotic welder gun re-programmed so that it stops from getting too close to the areas adjacent to the mounting holes of the outboard arm and control arm. This will minimize weld spatter. - The distortion of the flat plates is due to the high degree of heat generated during welding. We conducted experiments, changing the sequence of welding operations until we were successful in minimizing the distortion. We apologize if our customer service in addressing your concerns was insufficient at the time of your phone call. Timbren is an ISO 9001:2008 company with an excellent reputation for providing customers with quality products that are well-performing and easy to install.
-- comment by: Quality A - 09/26/2013

2108

- A20RS545
by:

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


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



- A20RS545
by:

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


This is my first time in building something like this 774926



- A20RS545
by:

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


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



- A20RS545
by:

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


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


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Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • Dimensions of the Timbren Axle-Less system part # A12RS440
    I attached all of the dimensional drawings we have for the Timbren Axle-Less system part # A12RS440 that you referenced.
    view full answer...
  • Changing Hubs with 4x100 Wheel Bolt Pattern for Hubs with 4 on 4 Wheel Bolt Pattern
    Your best option is going to be to replace both the axles and the hubs. We unfortunately do not have any hub that use the same inner and outer bearings as your current hubs. If you decide you want to replace your trailer axle, the Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 Pounds # A12RS440 is a great option. This system doesn't use a traditional through axle, but rather works independently on each side and will fit any frame width trailer....
    view full answer...
  • Axle Recommendation for Small Camper Trailer Towed Behind Motorcycle
    You'd be a good candidate for the Timbren kit part # A12RS440 which is an axle-"less" kit that attaches to the trailer frame directly. I attached a picture that shows how it attaches to a trailer frame. It wouldn't require you to measure out the exact axle length you need either. The capacity is 1,200 lbs.
    view full answer...
  • Recommended Replacement Spindles and Suspension for Harbor Freight Trailer
    The Harbor Freight trailers are notorious for not being compatible with standard bearing replacement sizes. Unfortunately there is not a simple bearing replacement I can give you. The spindles of those trailers are an odd size that work well only with their bearings which we do not carry. My recommendation is to replace your trailer with a new one of the same quality for the cost of the replacement parts or upgrade your axles to the Timbren Axle-Less Trailer Suspension System with...
    view full answer...
  • Is the Spindle Attached to the Assembly on the Timbren Axle-Less Trailer Suspension System
    For the Timbren Axle-Less Trailer Suspension System with Hubs # A12RS440 that you referenced, the spindle is assembled to the backing plate, and you do not have to do any welding. I have checked with my contacts at Timbren, and you will have to install the backing plate on the control arm of your assembly, but this is a bolt on application. Please note that you will need to properly pack the bearings with grease before installing them on the spindle. This is an EZ Lube Spindle, but...
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  • Realigning Axle-less Trailer Suspension on Motorcycle Trailer
    I recommend checking the alignment of your spindles before purchasing a new axle. Unless there is something wrong with the system itself, it may only need to be realigned. An easy way to check the alignment at home is to measure from the end of the spindle to the centerline of the trailer at the coupler. I have attached a diagram showing this measurement for you. A trailer shop, or other fabrication shop, should be able to help you re-align the trailer by removing and repositioning...
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  • Recommended Axle for 3 Foot Wide Dog trailer
    For a 3 foot dog trailer you probably need an axle that is 40 inches from hub face to hub face and has the spring locations that match with your frame. We have an axle-less system that is ideal for your type of application and it includes the suspension needed. I recommend the Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 lbs # A12RS440 which includes the hub assemblies and is compatible with wheels that have a 4 on 4 inch bolt pattern. For...
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  • Timbren Axle-Less Trailer Suspension System Recommendation for a 1977 13 ft Scamp Trailer
    Converting a torsion axle trailer to a trailer with a Timbren Axle-Less Trailer Suspension System has been done before and most people who have done this really prefer the smoother ride and increased ground clearance. Timbren 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...
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  • Recommended Axle-Less Suspension System For Small Home Made Trailer
    I recommend going with an axle-less system. Due to the size of the trailer you will have a much easier time finding the right fit and you will not need to worry about the suspension like springs or hangers. The system I recommend is part # A12RS440. This system is designed with a capacity up to 1,200-lbs and has hubs with a 4 on 4 bolt pattern already installed. I have attached a link to a review video for this system you can check out. The 12-inch tire/wheel combo I recommend is...
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  • Recommended Axle-Less System For Small Trailer
    If you are looking for axles with 48 inches spring-center-to-spring-center length, we offer several but they have a weight capacity of 2,000 or 2,200 lbs. I have attached a link to the product page for these axles you can check out. The closest we come to the 1,000 lb axles you mentioned is our axle-less systems like part # A12RS440. This is a system that has 1,200 lbs capacity and includes a 4 on 4 hub. This is a nice system because you do not have to worry about the width of the trailer...
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  • Recommended Hubs For 1,200 lb Timbren Axle- Less Suspension System
    Your Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 lbs # A12RS440 can use the different bolt pattern hubs. I recommend for your 5 on 4-1/2 hubs the Dexter Axle Trailer Hub Assembly for 2,000-lb E-Z Lube Axles - 5 on 4-1/2 - 13" - 15" Wheels # 8-258-5UC1-EZ. This is a confirmed fit. You will need compatible wheels and tires with your new bolt pattern, so I have linked the page to your options for your convenience. These hubs are compatible with...
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  • Replacement Axle on Boat Trailer
    I may have solution for you but unforunately we don't carry an axle with those measurements. If you'd like a traditional axle you might be better off sourcing one locally so it can be ordered with the exact specs you need. Another option is a universal fit axle-less suspension. You'll need to purchase a system based on your boat trailer's axle capacity. For example, part # A12RS440, replaces 1,200 pound axles and has the bearings and hubs with a 4 on 4 bolt pattern. I've attached...
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  • Timbren Axle Less System Recommendation with a 5 on 5 inch Bolt Pattern Hub
    If you were to get the Timbren Axle-Less Trailer Suspension System # ASR2KHDS02 you would get almost the same system as the part # A12RS440 that you referenced minus the hubs, but also a 2,000 lb capacity. You would be able to pick a different hub to fit the spindle. The correct hub you would want that would also give you a 5 on 5 inch bolt pattern would be the Trailer Hub Assembly # 84550UC1-EZ. In the 1,200 lb capacity range there is no way to get the bolt pattern you want.
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  • Are Tires Included With Timbren Axle-Less Suspension Systems
    The Timbren Axle-Less Systems do not come with tires included. The description states it can be used with regular tires so that may be where the confusion comes from. The Timbren system # A12RS440 does come with idler hubs that have a 4 on 4 wheel bolt pattern. The # A20RS545 system has idler hubs with a 5 on 4-1/2 wheel bolt pattern. I have attached a link to our product page for the tire/wheel combinations we offer. You can use the page filters to find the combos that would work...
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  • Can the Timbren Axle-Less Trailer Systems be Used on the Highway
    The Timbren Axle-Less Trailer Suspension System # A12RS440 that you referenced can definitely be used on the highway.
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  • Recommended Axle-Less Trailer Suspension System For Trailer With Springs 42 Inches On Center
    We don't have an axle compatible with center of spring to center of spring dimension of 42 inches. We do however have an axle-less system that will work. I recommend the Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - Regular Tires - 1,200 lbs # A12RS440 or the 2,000 lb capacity system # A20RS440. This will replace your leaf spring suspension and give you the 4-on-4 idler hubs. It will bolt directly to your trailer frame and give you greater ground clearance because...
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  • Recommended Axle and Suspension for my 24"x59" Trailer with Coffee Maker on it
    I have a great solution for you. Using the Timbren Axle-Less Trailer Suspension System with Hubs part # A12RS440 and the Kenda 205/65-10 Bias Trailer Tire with 10" White Wheel part # AM3H410 will give you exactly what you need without the need to have a custom axle built. It sounds like the entire trailer is 24" wide by 59" long which is quite narrow and would require a custom axle be built. We can likely get you what you are looking for if you decide to go this route. IF there is enough...
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  • How Much Clearance Is Needed For Tires When Installing Timbren Axle-Less System Under Trailer
    I called my contact at Timbren to get some information for you about the axle-less systems. For the 1,200-lb systems the distance from the center of the spindle to the underside of the frame where the bracket mounts it is 2-5/8 inches. And for these systems they have a deflection of 2-1/8 inches. I have attached a drawing that shows these dimensions you can check out. You will want at least an inch over the deflection distance. There is no hard rule because it depends on the road conditions...
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  • Replacement Axle and Suspension System for Small Boat Trailer
    I have a set-up that may work for you, but unfortunately we do not have exact matches for the parts you are looking for. Since the number of leaves doesn't directly relate to the capacity, the main concern when choosing leaf springs is the length of the spring. The only 26 inch long leaf-spring we have is a 6-leaf spring for 4,500 pound axles, # SP-256275. We do not carry any galvanized axles, and none of the common axles that we carry have an overall length of 54 inches. The best...
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  • Recommended Trailer Axle For Haul Master 4x8 Foot Trailer
    Replacing your existing axle with the Dexter Trailer Axle with Idler Hubs - 5 on 4-1/2 Bolt Pattern - 60" Long - 2,000 lbs # 20545I-ST-60-15 or Dexter Trailer Axle with Idler Hubs - 4 on 4 Bolt Pattern - 60" Long - 2,000 lbs # 20440I-ST-60 will work fine as long as the Hub-face-to-hub-face length is 60 inches and spring-center-to-spring-center length is 48 inches. This will give you a higher capacity axle but you will still be limited to whatever weight capacity the weakest component of...
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  • Recommended ATV Trailer Axle and Wheels
    There are no trailer hubs that are compatible with your ATV Rims. Your ATV bolt pattern equates to 4 on 4-1/3 inches which is not a trailer hub option. For your off-road ATV trailer, I recommend the Timbren Axle-Less Trailer Suspension System with Hubs -1,200 lbs # A12RS440. These do come with the EZ-Lube spindles for easy maintenance. Then for your tires and wheels I recommend the Kenda 205/65-10 Bias Trailer Tire with 10" White Wheel - 4 on 4 - Load Range C # AM3H370. I've attached...
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  • Axle Recommendations for Homemade Motorcycle Trailer
    I can help you determine which Timbren Axle-less system is the right one for your trailer. If your total trailer weight including the weight of the motorcycle is under 400lbs. then the Timbren # A4WS440 system will be a good fit for you. These axle-less systems provide a smooth and quiet ride without having to sacrifice any ground clearance. Depending on what your total trailer weight ends up being you may want to go up to the next highest capacity set rated at 1,200lbs. # A12RS440. If...
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  • Axles, Lighting, Fenders and Wheel Options for a Trailer Used for a Hobie 16
    If you really wanted to you could use the Dexter Trailer Idler Axle w/ Idler Hubs # 20440I-EZ-60 on your trailer, but you will have to move the suspension hangers on your trailer out a half an inch on both sides for it to properly fit. Another option would be to find a local trailer shop and have them custom order you axles that will fit your exact measurement. Or you could go with an axle less system like the part # A12RS440. This is a great option that would be better matched to the weight...
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  • Axle Kit for Fabricated Ice House Trailer
    All of our trailer spindles are shown on the linked page, but none of these has a stub end to fit 2 x 3-inch tubing. All are either round like # TRU74FR or square like # TRU47FR. For a fabrication project like yours a better solution may be a bolt-on axle-less suspension kit from Timbren, such as # A12RS440, which is rated for 1200-lbs and which includes idler hubs with the 4-on-4-inch bolt pattern. Bearings, races and seals are included with hub. All Timbren axle-less kits and beam...
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  • Recommended Timbren Axle-Less Trailer Suspension System for Harbor Freight Trailer
    As you can see in the attached dimensional drawing of the Timbren Axle-Less Trailer Suspension System part # A4RS440, the distance from the center of the spindle to the bottom of the trailer frame is 2-1/2". If you required a greater distance between the center of the spindle to the bottom of the trailer frame, you would need to go to the next size system which is part # A12RS440 that has 2-5/8" of clearance. Both of the above spindles come with hubs that have a 4 on 4 bolt pattern....
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  • Trailer Suspension Axle Recommendation for a Custom Made Tear Trailer
    You could use a standard trailer axle if you wanted to. You just would need to find one properly rated for the weight of your trailer. The lightest one we offer is a 2k axle, part # T20BTR-6048. This axle is 60 inches long from hub face to hub face and 48 inches from spring center to center. If that matches the dimensions of your trailer this axle would work well for you. If not, you would need to have one custom made at a shop local to you that can order in custom axles. One option...
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  • Replacement Hubs for Oddball Axle or Axle Replacement for Boat Trailer
    The Trailer Hub Assembly - 3,000 lbs Axles - 4 on 5 - Agricultural # AH15450ECOMP is the only fit we have for those bearings. It has an odd bolt pattern of 4 on 5 inch. This likely isn't what you are seeking for your boat trailer. If you can give me some more information on your trailer I can help with a replacement. For a standard trailer axle, I need to know your spring seat to spring seat measurement, bolt pattern of your hubs, and measurement from hub face to hub face. If your...
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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Rachael H
Expert Research:
Jeffrey L
Written by:
David L
Updated by:
Laura H
Installed by:
Randy B
Video by:
Zach D

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