1. Trailer Leaf Spring Suspension
  2. Timbren
  3. Axle Replacement System
  4. Axles
  5. Universal Fit
  6. 5200 lbs
Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle w/ Brake Flange - 5,200 lbs

Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle w/ Brake Flange - 5,200 lbs

Item # ASR5200S04
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Our Price: $871.26
Trailer Leaf Spring Suspension
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Shipping Weight: 179 lbs
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Timbren Axles - ASR5200S04
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The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle. Suspension units replace your existing axle and operate independently. The 4" drop spindle allows for a low deck height. Fits any frame width. Lowest Prices for the best trailer leaf spring suspension from Timbren. Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle w/ Brake Flange - 5,200 lbs part number ASR5200S04 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (143)
  • Q & A (39)
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Timbren Trailer Leaf Spring Suspension - ASR5200S04

  • Axle Replacement System
  • Axles
  • Universal Fit
  • 5200 lbs
  • Timbren
  • Spindles Only

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


Features:

  • Suspension system provides a safe, smooth, quiet ride for your trailer
    • 2 Separate units replace your existing axle
  • AEON progressive-rate main springs absorb road shock and support trailer's load
    • Deliver a smooth, stable ride, regardless of load size
    • Compress and become stiffer as load increases, boosting spring strength
  • Rebound springs act as return devices to minimize rattle and bottoming out
    • Create constant pressure on the arm, so the suspension is never completely relaxed
  • 2 Independent units can eliminate the need for a thru axle
    • Increase ground clearance
    • Lower deck height for easier loading and unloading
    • Reduce roll during cornering
    • Fit any trailer width
  • Built-in camber and toe-in help your trailer to track straight, reducing wear on the tires
  • 4" Drop, EZ Lube spindles accept trailer hubs (sold separately)
    • 4" Drop provides lower ground clearance
    • Spindles can be easily removed from units for simple replacement if damaged
  • Heavy-duty steel construction with black powder coat finish resists wear and corrosion
  • Easy to install and align
    • Bolt or weld to your trailer's frame


Specs:

  • Fits: 1-axle and 2-axle trailers that use drum brakes and regular tires
    • Not recommended for triple-axle applications
  • Weight capacity: 5,200 lbs
  • Quantity: 2 suspension units without hubs
    • Works with Dexter 12" hubs (KBD2-655-19 - sold separately)
  • Spindle/Hub compatibility:
    • Bearings: 25580 inner/15123 or LM67048 outer
    • Seal inner diameter: 2.250"
  • 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 2" x 3" steel tubing to connect the 2 Timbren suspensions together using the built-in 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" x 3" holes make it easy to reinforce your trailer's frame by adding steel tubing (if needed).


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


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


Timbren Axle-Less Suspension Parts

Components

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

ASR5200S04 Axleless Trailer Suspension System by Timbren - 4" Drop Spindle - Without Hubs - Regular Tires - 5,200 lbs






Customer Reviews

Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle w/ Brake Flange - 5,200 lbs - ASR5200S04

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. Suspension units replace your existing axle and operate independently. The 4" drop spindle allows for a low deck height. Fits any frame width.

- ASR5200S04
by:

I ordered two sets of these and one set was missing all of the hardware. The other set had all the hardware scattered in a box. 517652



- ASR5200S04
by:

I received order one box was torn in shipping i think most all the bolts are there . I had 3 surgeries this year i had to put trailer project on hold . I'm ready to get started any day now I'll send pictures when done . 467391



- 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

- 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



- 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

- 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


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



- 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


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



- A20RS545
by:

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


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



- 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


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


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Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • Recommended Axle-Less Trailer Suspension for 5K Capacity with Brakes
    We do not have a kit for what you are seeking but I do have the parts to help. You will start with the Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle w/ Brake Flange - 5,200 lbs # ASR5200S04. This will allow you to use the Trailer Hub and Drum Assembly - 5.2K and 6K E-Z Lube Axles - 12" - 6 on 5-1/2 - Pre-Greased # AKHD-655-6-EZ-K along with the Electric Trailer Brake Kit - Self-Adjusting - 12" - Left and Right Hand Assemblies - 5.2K to 7K # AKEBRK-7-SA. This gives you...
    view full answer...
  • Trailer Frame Mounting Space Required for Installing Timbren Axle-Less Suspension System ASR5200S04
    The Timbren Axle-Less Trailer Suspension System # ASR5200S04 that you referenced will require a trailer frame area of at least 14-5/16" inches long and about 3" tall for proper mounting. I have attached a dimensional diagram below with this and other measurements labeled for the setup (just note that the spindle measurement isn't correct since this model features a 4" drop). When mounting to the frame it's extremely important to use all 3 bolt holes provided, so this full length is needed....
    view full answer...
  • Can Timbren Axle Less Systems be Used on an Aluminum Trailer
    There's no reason you couldn't install either the Timbren Axle Less part # ASR5200S04 with 4 inch drop spindles or the part # ASR5200S01 on an aluminum framed trailer.
    view full answer...
  • Availability of 5,200 Pound Trailer Axle for 5,200 Pound Disc Brake Kit
    We do not have 5,200 pound regular straight axles but we do have an axle-less system, # ASR5200S04 and it will work with disc brake kit # T4871400. You will also need 2 bearing kits, # BK3-100, since the brake kit does not come with them. If you want a straight axle then you could order one to your specifications from a local tractor or trailer supply store.
    view full answer...
  • Could Timbren Axle Less Suspension System be Used on Fish House Trailer Suspension
    I looked up some fish house suspension setups and there really isn't a reason you couldn't use the Timbren Axle-Less System part # ASR5200S04 on a fish house trailer
    view full answer...
  • Replacement 5,200 Lb Axle for a Hudson Trailer
    I do have an option for you but we do not have a direct replacement for your trailer. Instead, you will want to take a look at the Timbren Axle-Less Trailer Suspension System part # ASR5200S04. This system will actually replace the axle and leaf springs with an aeon spring that will work to absorb road shock and support the trailer's load better than the system you have now. They have the same 4" drop as your current system and you could use your existing backing plates and drums so long...
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  • Can Timbren Axle-Less Suspension be Used for a Boat Trailer/Marine Applications
    You can use Timbren Axle-Less suspension for marine applications. But you would need 3500 pound kit # ASR3500S05. If attaching brakes you would need hydraulic brakes and not electric brakes. For a hub and drum assembly you could use # 8-247-50UC3-EZ which is a galvanized model for corrosion resistance. It has a 5 on 4-1/2 bolt pattern For compatible brake assemblies use # 23-312 for the left and # 23-313 for the right. Then you would need a brake actuating coupler, see link to the...
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  • Recommended Hub/Drum Assembly with 8-on-170mm Wheel Bolt Pattern for Off-Road Trailer
    The closest bolt pattern we would offer to the 8 lug on 170mm bolt pattern you mentioned would be an 8 lug on 6-1/2 bolt pattern. 6-1/2 inches is 6.692 inches, which is close, but not exact. The Timbren Axle Less suspension system you mentioned, part # ASR5200S04 is compatible with an 8 on 6-1/2 inch bolt pattern hub like the Titan # T1870100CB042. You'd also need one bearing kit per wheel, part # BK3-210 and 8 lug nuts, part # CE11051. For a brake assembly, I really like Nev-R-Adjust...
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  • Is an Axle-Less Suspension Available With Air Bags?
    Though there are a number of axle-less suspension systems available for a trailer, there are none that have air bags to allow the trailer to be lowered. There are axle-less suspension systems with a 4" drop spindle to allow for a lower deck height such as # ASR5200S04. I've added a link to a video review of this system for you as well as a link to each of our Timbren systems.
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  • Dimensions of the Timbren Axle-Less System part # ASR5200S04
    I attached a picture that has all of the dimensions of the # ASR5200S04 that you referenced for you to check out.
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  • Replacing 3500-lb Axles with 5200-lb Axles on Enclosed Cargo Trailer
    You can change out the 3500-lb axles on your enclosed trailer with higher-capacity 5200-lb axles but this will not necessarily increase the weight capacity of the trailer. The trailer manufacturer should be consulted (giving them your trailer's VIN) to allow them to determine if the other components in it, such as its frame, have the capacity to allow you to benefit from increasing the axle rating. Also, it will likely be necessary to change your hubs to ones that are higher rated to...
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  • Are Timbren Axle-Less Suspensions Available in 7000-lb Capacity
    Timbren axle-less suspension such as the 5200-lb capacity system # ASR5200S04 that you referenced are the highest-rated offered by Timbren. Currently nothing in a 7000-lb equivalent axle capacity is available. These axle-less systems are not recommended for triple axle applications due to the effects of axle scrubbing; when the trailer turns one set of Timbrens will bear the turning load and the other will be dragged along for the ride. This scrubbing is permissible for a tandem application...
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  • Recommendation for Timbren Axle-Less Trailer Suspension System with 5,200 LB Weight Capacity
    Timbren offers the Axle-Less Trailer Suspension System, # ASR5200S04, that has a 5,200 pound weight capacity with 4" drop spindle allows for a low deck height. Since this system does not include hubs you would need the following: Hub and Drum Assembly, # 42656 Qty 2 Bearing Kit which includes 15123 and 25580 bearings with 10-36 seal, # BK3-100 Qty 2 OR Idler Hub, # 42655UC1 Qty 2 The idler hub includes bearings, races, seal, and grease cap.
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  • Disc Brakes, Tires, and Wheels for Timbren 5,200 Pound Axle-Less Trailer Suspension System
    For 5,200 pound axles such as # ASR5200S04 I recommend disc brake kit # K2HR526D which will accept wheels as small as 15 inches. Only certain kits with certain bearing sizes will fit the spindles on the axle-less systems so 15 is as small as you can go. That means a 225/75-15 tire and wheel combo, see link. This size has an outer diameter of 28.4 inches. For a tire and wheel in this size that has a higher enough capacity for 5,200 pound axles I recommend # AM32680 rated for 2,830 pounds...
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  • Adding a Second Axle to a Food Trailer to Increase Capacity
    You could put a second axle on the trailer you have to help distribute the load better, but I would recommend you either remove your current axle and install two sets of the Timbren axles or match what you currently have and add another axle just like it. Either way your current axle will have to get removed because it will at least need to get moved forward or back so that you have the correct axle placement on your trailer. Basically where your current axle is located is where the...
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  • What is the Weight Capacity of Set of 4 Timbren Axle-Less Suspension Set Up As Tandem Axles
    Each paired set of the Timbren Axle-Less Suspension, like # ASR5200S04 and # ASR3500S04, can be compared as one traditional axle when trying to compare the weight capacities. The Timbren # ASR5200S04 are rated at 5,200 lbs or 2,600 per Timbren unit. If you install 4 total in a tandem axle set-up, then the weight capacity would be 10,400 lbs on the axles. The Timbren # ASR3500S04 are rated at 3,500 lbs per pair and in a tandem set-up the axle capacity will be 7,000 lbs.
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  • Axle-Less Trailer Suspension System Rated for 5,200 lbs
    We do have a solution that can work for you although we do not offer any custom width trailer axles. Instead I highly recommend checking out the Timbren Axle-Less Trailer Suspension System and we have two options available rated for 5,200 lbs, Timbren 4" Lift Spindle w/ Brake Flange # TASR5200S03 and Timbren 4" Drop Spindle w/ Brake Flange # ASR5200S04. The Timbren axle-less suspension systems are simply bolted or welded so you do not have to worry about finding an axle that meets...
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  • Replacement Axle Parts for Superior 24 3 Dexter Axle Equipment Beaver Tail Trailer
    The 8-133 hub is a mobile home axle hub. Typically these hubs are very hard to find replacement parts for since they are designed for one time use. I recommend replacing the entire axle and its setup, it is likely that the weight capacity is between 5,200-7,000lbs, since they are 12 inch brakes. We offer an 5,200 axle-less system by Timbren # ASR5200S04 that uses the same inner and outer bearing numbers that the 8-133 axle did according to Dexter. If you wanted to try to replace...
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  • Drum-Less Hub for Timbren Axle-Less Trailer Suspension System and 17 Inch Wheels
    The Timbren Axle-Less Trailer Suspension System - 4" Drop Spindle w/ Brake Flange - 5,200 lbs # ASR5200S04 can use the Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2 # 42655UC1 with your 17 inch wheels.
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  • Recommended Replacement Trailer Brakes, Brake Drums and Hydraulic Coupler for Boat Trailer
    The Timbren Axle-Less suspension system you mentioned is compatible with the brake hub/drum # 8-201-51UC3-EZ and the # T4489500 right hand and # T4489600 left hand free backing brake assemblies. The brake drums are galvanized and the brake assemblies have a Galphorite plating for corrosion protection. The brake drum has a 6 on 5-1/2 inch wheel bolt pattern. It sounds like you're interested in a hydraulic or surge coupler. I'd recommend the Dexter Drop-N-Go Brake Actuator, part # 099-175-00...
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  • Can Timbren Axle Less System be Used on Tandem Axle Trailer
    Timbren Axle Less systems like the # ASR5200S04 that you referenced can be used in tandem trailer applications. Timbren has told us several times that tandem applications are fine, they don't recommend triple though.
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  • Hub and Wheel Recommendation for Use with Timbren Axle Less System part # ASR5200S04
    The Timbren Axle Less System part # ASR5200S04 comes with a left and right side for your trailer. You would need to put hubs on this kit like the part # 8-213-5UC1-EZ and then for wheels the # TTWA225B6SM is our most popular option with people who have bought this kit. A much better option would be the wheel/tire that comes with a radial tire, part # A225R6SMQ. Radials have more flex in their sidewall so they have better ground contact and build less heat.
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  • Timbren Axle-Less System, Hub Drums and Brake Assembly Recommendation for a Travel Trailer
    All of the parts you referenced would work well together. The Timbren Axle-Less system part # ASR5200S04 that you referenced would have more than enough capacity as it has a 5,200 lb per axle capacity. I would recommend you reinforce the frame around where the axles will be for added strength. The brake hubs # 8-201-5UC3-EZ would fit the axles and the brake assemblies # 23-459 and # 23-458 would fit those hubs and the brake flanges of the Timbren.
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  • Hub/Drum and Brake Assembly Recommendation for the Timbren Axle-Less System # ASR5200S04
    I have an easy solution for you, but the Timbren Axle-Less Trailer Suspension System # ASR5200S04 that you referenced is not available with hub/drums. What you will need is to also order the part # 8-201-5UC3-EZ for the hub drums and then part # 23-325 for the right hand brake assembly and # 23-324 for the left hand side.
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  • Can Timbren Axle-Less System Be Installed On Car Dolly
    There will be no problem using the axle-less system on a car dolly, as long as you do not exceed the weight capacity of the suspension or the trailer. I recommend the Timbren Axle-Less Trailer Suspension System, part # ASR5200S04. This features a 4 inch drop spindle for a low deck height and will fit any frame width. This is a bolt-on or weld-on installation and has a weight capacity of 5,200 lbs. This will work for 1-axle or 2-axle trailers.
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  • Should 3,500 lb or 5,200 lb Timbren Axle-Less System be Used for over 3,600 lbs of Loaded Trailer
    Since your axle will ultimately be under the weight of your trailer and it's contents you definitely need to make sure that it is rated for more than what you will be carrying. You need to go with the 5,200 lb weight capacity. For this we have the Straight Spindle # ASR5200S01, 4" Lift Spindle # TASR5200S03, and 4" Drop Spindle # ASR5200S04. This is compatible with the idler hub # 8-213-5UC1-EZ or the hub and drum assembly # 8-201-5UC3-EZ. I recommend going with the hub and drum assembly...
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  • Can 3,500 lb Axles be Changed to 5,200 lb Axles and Parts Needed
    The short answer is yes, you can replace your 3,500 lb axle with a 5,200 lb axle. The longer answer is that while you can change to a higher-rated axle, that does not mean your trailer has a higher weight capacity. The reason is, weight ratings are determined by the lowest-rated component, which can be something other than the axle, like the trailer chassis, for example. So you would need to ensure via the trailer manufacturer what the lowest-rated component is. With that said, in order...
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  • Recommended Replacement Axles for Old Dexter Axle #11 5,200 lb Torsion Axles
    I reached out to my contact at Dexter Axle who said that based off of the numbers you sent in it sounds like you have a #11 Torsion axle rated for 5,200 lbs that is on a Haulmark Trailer manufactured back in 2001 (at least the axle was). Your axle should use 6 lug hubs with EZ-Lube spindles and that it has a 95" hub-face measurement with a 75-3/4" outside bracket measurement (which would be equivalent to spring-center). The closest thing that we have to this is the Dexter Trailer Axle...
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Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Video Edited:
Kathleen M
Written by:
Laura H
Installed by:
Randy B
Updated by:
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Updated by:
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Video by:
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