1. Trailer Leaf Spring Suspension
  2. Timbren
  3. Axle Replacement System
  4. Axles
  5. Universal Fit
  6. 400 lbs
Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 400 lbs

Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 400 lbs

Item # A12WS545
lowest price pledge
Our Price: $425.61
Trailer Leaf Spring Suspension
This item qualifies for Free Shipping
Shipping Weight: 77 lbs
Timbren Axles - A12WS545
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos


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 - 5 on 4-1/2 - Off-Road Tires - 400 lbs part number A12WS545 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (156)
  • Q & A (57)
  • Photos
  • Why etrailer?

Timbren Trailer Leaf Spring Suspension - A12WS545

  • Axle Replacement System
  • Axles
  • Universal Fit
  • 400 lbs
  • Timbren
  • 5 on 4-1/2 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.


  • 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 5-bolt wheels with low-pressure, off-road 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


  • Fits: 1-axle and 2-axle trailers that use low-pressure, off-road tires
    • Greater distance between hub face and trailer frame is designed for off-road tires
    • Not recommended for triple-axle applications
  • Bolt pattern: 5 on 4-1/2"
  • Weight capacity: 400 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


  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 5-bolt wheel that has a low-pressure, off-road 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

A12WS545 Axleless Trailer Suspension System by Timbren - Hubs with 5 Studs on 4-1/2" Bolt Circle - Wide Tires - 400 lbs

ASR400S01 Timbren Axle-Less 1200S, P021 Outboard Arm Wide Spindle

88440_2 2500 lb Idler Hubs - 545 1/2" Stud - Qty 2

Customer Reviews

Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 400 lbs - A12WS545

Average Customer Rating:  4.6 out of 5 stars   (156 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.

- A12WS545

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

- A12WS545

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

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


- A12WS545

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

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


- A12WS545

Impressed with quality and strength of these 1/2 axles. Very impressed. Will be buying more. Also, website easy to navigate. Sudden service and rapid delivery. Thanks. 936366

- A12WS545
by: 12/20/2020

Work like it should. 927285

- A12WS545

Everything looks good so far just opened the boxes. 481425

- A12WS545

Work great no bounce 443935

- A12WS545

Extremely fast delivery! Still building but excited to get these bad boys mounted and the trailer bouncing boulders with us! 442127

- A12WS545

This place shipped fast and product arrived sooner than I expected! The item was exactly as described and packaged very well. I would recommend etrailer.com to anyone building or repairing. 311848

- A12WS545

This review is limited to eTrailer customer service since I have not yet installed the suspension. The part I ordered was out of stock when my order was placed. An eTrailer representative notified me both by email and by phone informing me of the situation and offering direct shipment from the manufacturer in the event time was an issue. While time was not an issue for me, I was impressed eTrailer took such a proactive approach in dealing with the stock out. Additionally, despite the item being out of stock, i did still receive it in a timely matter (~2 weeks). 235933

- A12WS545

First off let me say these axles are EXCELLENT mainly because of their very good design. From what i can tell Timbren is a 9/10 manufacturer. Welds are fantastic(im a professional welder) and this thing is HEAVY DUTY THICK STEEL. Only defect was some paint scratched and one of my grease fittings came right out when i was done greaseing the joint.I welded these up to my custom fabricated trailer and they are just amazing. I would urge anyone to get Timbren suspensions over leaf spring/torsion ANY DAY.. 231681

- A12WS545

The product got here in great time delivered on time as said. But I had problems with the square hole in two of the suspension brackets -- the had one side of the inside tube that had a large radius that won't fit the square tubing you are going to slide through it. I spent a lot of time trimming the bracket and rounding off the tubing I need to install. I live in a residential neighbor hood and working early in the morning. Fitting the tubing in the hole it gets wedged in and I had to pound it in to get the fit needed. Too noisy and it should fit to start with. If a person knows he is going to use this square hole in assembly then the seller needs to send the brackets that fit properly. I have to build a sub frame for this small trailer because the shelving tubing I am using for the deck is too light of gauge to put the suspension system directly too. And I had to chase the threads on one of the spindles because I couldn't turn the nut with channel locks to adjust the bearing to fit. Hope the rest of the assembly goes easier. Still got lots work to do but too hot in after noon. 209085

- ASR5200S01

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


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


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

We just drove 1200 miles mostly at 75mph. The axles work very well in all conditions, trailer ride very smoothly.
PhilTreeMan - 11/20/2019


- ASR5200S01

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

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


- A20RS545

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

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


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

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


- A20RS545

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

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

Received my order. Quality is very good. Intend to use on fishing shanty frame. I thought that the wire I ordered was 4-wire round, not flat. That was my preference but I guess I should have inquired prior to ordering. I feel that the quality of the flat wire could be better. All other products are very nice and I am happy. Service was excellent. Thank you 242026


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

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

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


- A35RS545

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

- A20RS545

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

- A20RS545

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

I bought these to replace an axle on an older trailer that I could not buy a replacement axle from the manufacturer. They are well made, a correct fit and the Customer service could not be better. Due to the careless handling of the shipper, a component of the product was damaged. With a simple phone call, I was able to have a replacement part shipped out that day. I would recommend everyone to shop here before going to their manufacturer! 721618

Show More Reviews

Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • Is There a Timbren Axle Less Kit Setup that Fits Jeep Wheel Bolt Pattern 5 on 5 inch
    We have to tell you that you shouldn't use Jeep wheels on a trailer as they weren't intended for use on a trailer. That said we know people do this all the time so you'd probably be fine. We've seen people use the Timbren Axle Less kits with Jeep Wheels too. Part of why the Timbren Axle-Less Trailer Suspension System with Hubs # A12WS545 is for "off road" tires is for this purpose so it's physically possible. The Jeep wheel bolt pattern is 5 on 5 inch like what the part # 84550BX has....
    view full answer...
  • Compatibility of Timbren Axle-Less Suspension on Boat Trailer
    The Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 1,200 lbs # A12WS545 is a great option to replace an axle. It will replace the axle no matter the length and attach to the frame replacing the leaf spring suspension as well. You simply need to run a 2 inch square bar (not included) between the two assemblies into the integrated holes. This will have a max capacity of 1,200 lbs, has no maintenance suspension, and comes with EZ lube spindles...
    view full answer...
  • Can I Use Timbren Axle-Less Trailer Suspension System with Hubs on my Boat Trailer
    The Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires part # A12WS545 can be fully submerged in fresh water to launch your boat. They are designed with a corrosion resistant black powder coat and a lot of our customers use them on their boat trailers. I have attached a video for your reference and the dimensions of the system. I recommend Loadstar Kenda ST175/80D13 Bias Trailer Tire with 13" Aluminum Wheel part # AM31245 with a 5 on 4-1/2 bolt pattern....
    view full answer...
  • Small Gap Between Trailer Frame and Timbren Axle-Less System After Installation
    The weight of the trailer itself will slightly compress the rubber springs on the Timbren Axle-Less suspension systems such as # A12WS545. Since the gap is so small redrilling the holes won't help. Your best option is to use appropriately sized steel plates between the trailer frame and the Timbren system to close that gap.
    view full answer...
  • Can Built-In Camber be Adjusted on Timbren Axle-Less Trailer Suspension System with Hubs
    When installing the Timbren Axle-Less Trailer Suspension System with Hubs # A12WS545 referenced in your question, the toe-in will need to be set. However, the system does include shims that will allow you to adjust the camber as needed. I have attached an installation video on this product for you to check out. Right around the 4 minute mark you can see this feature explained. This is a great axle-less suspension system with a weight capacity of 1,200 pounds and a bolt pattern of 5...
    view full answer...
  • Timbren Axle-Less Trailer Suspension and Hubs with 5 on 5 Bolt Pattern
    In order to use idler hubs that have a 5 on 5 bolt pattern you would have to use Timbren Axle-Less system # ASR3500S05. Then you could add 2 of hub # 84550UC1-EZ. But the Timbren system is rated for 3,500 pounds which will be stiffer than the 2,000 pound model # A12WS545. If you can go with a 3,500 system then this is the best option. None of the hubs with 5 on 5 bolt pattern will fit the 2,000 pound Timbren systems.
    view full answer...
  • Can Timbren Axle-Less Trailer Suspension Rubber Springs Be Replaced to Increase Weight Rating
    Thank you for your purchase last year of a Timbren Axle-Less Trailer Suspension System with Hubs, part # A12WS545. This system is rated for 1200-lbs overall weight capacity. If you are exceeding the system's capacity you can, according to my contact at Timbren, replace the main compression spring with a heavier-rated unit, part # A00100-55000, which will increase the system's rating to 2000-lbs.
    view full answer...
  • Comparing The Timbren Axle-Less Trailer Suspension System To The FlexiRide Half Torsion Axle System
    For an off road overland trailer, I recommend you go with the Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 1,200 lbs # A12WS545 and not just because we carry them...as I know seems like a conflict of interest. The Flexiride system even with a 1,400 lb capacity is not made for off road and the suspension is a torsion system with rubber cartridge on each side. The Timbren system uses more of a jounce style bumper that the company is known for regarding...
    view full answer...
  • 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...
    view full answer...
  • Dimensions of Timbren Axle-Less Trailer Suspension # A12WS545 For Utility and Motorcycle Trailer
    Unfortunately there is not a 3D step model available for the Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 1,200 lbs # A12WS545. I've attached the diagrams that will help you with the dimensions for the unit to assist. I've also attached a video and the link to the product that does have a 360 degree photo to assist. This system will work well for the small utility and motorcycle trailers you mentioned. I've also attached an article to assist...
    view full answer...
  • Wall Thickness Recommendation for Square Tubing Support For Timbren Axle-Less Suspension
    If I were installing the Timbren Axle-Less Suspension System, # A12WS545, on my trailer, I would use a 2 inch steel tubing with a wall thickness of 1/4 inch. I spoke with my contact at Timbren and he told me that they do not have a minimum thickness that they require as long as it was a 2 inch steel square tube. It is recommended that you add this tube if your trailer does not have a crossmember above the suspension and 1/4 inch is a common wall thickness for a 2 inch square axle.
    view full answer...
  • Wheel Recommendation for Timbren Axle-Less Trailer Suspension System # A12WS545
    After doing some research on the 2011 Jeep Wrangler, it appears the bolt pattern of the OEM wheels is 5 on 5 inches. If that is the case, they will not be compatible with the hubs that come with the Timbren Axle-Less Trailer Suspension System, # A12WS545, that you referenced in your question. The hubs and spindles included are designed for 5 on 4-1/2 bolt patterns. If you are unsure of your wheel's bolt pattern, I have included a helpful article that explains how to measure this. I do...
    view full answer...
  • How Much Does the Axleless Timbren Suspension System A12WS545 Compress When Loaded
    The amount of deflection, or travel, that the Timbren axle less kit part # A12WS545 has is 2-1/8 inches I attached a picture that shows this as well.
    view full answer...
  • Timbren Axle-Less System Recommendation for a Tear Style Trailer Towing 500 lbs Max
    Based on the weight of your trailer and how much weight you plan on transporting the 1,200 lb Timbrens would be a better choice for you. Using a capacity system that is matched closer to what your trailer will see will provide you with an overall better ride quality than if you went with a system rated too high. For that you would want the part # A12WS545 that you referenced.
    view full answer...
  • What is Weight Capacity of Timbren Axle-Less Trailer Suspension System # A12WS545
    The 1,200 lb capacity of the Timbren Axle-Less Trailer Suspension System # A12WS545 is the axle capacity so it's the capacity of both sides together. I attached a link to a review video for this kit for you to check out as well.
    view full answer...
  • Timbren Axle-Less Suspension for 10,000 Pound Mobile Hydraulic Lift
    A tow-behind hydraulic lift is going to need to be stable so I recommend using a tandem axle set up just like you mentioned. That would equate to using 2 sets of Timbren Axle-Less systems rated for 5,200 pounds for a total capacity of 10,400 pounds. We have a couple of options in this capacity: # ASR5200S01 has regular spindles; no rise or drop, and # ASR5200S04 has a 4 inch drop spindle meaning that it will lower the trailer by 4 inches. For a hub and drum assembly that will fit...
    view full answer...
  • Recommended Axle for a Trailer and Cargo Weighing 800 lbs
    To determine if an axle will fit your trailer you will first need to the (A) hub-face-to-hub-face measurement and the (B) spring-center-to-spring-center measurement (see attached picture). Since this is the standard measurement for axles it will help you determine what axle you will need from our selection of axles that use the standard leaf spring suspension which has been linked for you to filter through. A great alternative option that takes a lot of the guesswork and calculating...
    view full answer...
  • Replacement Hub Assembly for Timbren Axle-Less System # A12WS545
    Yes, to replace a complete hub assembly on the Timbren 1,200 Pound Axle-Less System # A12WS545 the Dexter Trailer Idler Hub # 8-258-5UC1-EZ will work perfectly. This idler hub assembly includes the bearings, seal, and cap, and is designed for use with the EZ Lube spindles for the Timbren System for easy maintenance. I have attached a short video review on the hub below that you can also check out.
    view full answer...
  • Timbren Axle-Less Suspension System for a Tear Drop Trailer Build
    Trailer tires are constructed differently than vehicle tires and you can't use one on the other. Trailer tires are built with a thicker sidewall to handle more vertical load where as vehicle tires are not. The wheels are not as big of an issue but the problem is that vehicle wheels usually have an offset to move them either closer to or further from the body. The vast majority of trailer wheels have no offset so vehicle wheels are not a good idea on a trailer. If you go with Timbren...
    view full answer...
  • Replacement Grease Seal for the Timbren Axle Less System part # A12WS545
    The correct grease seal you would need for your Timbren Axle Less System part # A12WS545 that you have is the # 10-9.
    view full answer...
  • Will a Kenda 215/60-8 Bias Trailer Tire and Wheel Fit the Timbren Axle-Less System part # A12WS545
    Yes, the Kenda 215/60-8 Bias Trailer Tire with 8" White Wheel # AM3H310 is going to fit on the Timbren Axle-Less System part # A12WS545. If you check out the picture I attached you will see that when the Timbren is installed you will have a distance of 6-7/8 inches from the hub face to the trailer frame and the backspacing of the # AM3H310 is 4 inches so there would be more than enough clearance.
    view full answer...
  • Installing Timbren Axle-Less Suspension System on Older Trailer
    The Timbren Axle-Less Trailer Suspension System # A12WS545 referenced in your question can certainly be installed on your older trailer to replace its single axle. The suspension units will fit any frame width and they feature a weight capacity of 1,200 pounds. They cannot really be adjusted but because of how they are designed, they will definitely provide a smoother, quieter ride than what you have gotten used to. The AEON progressive-rate springs will also absorb road shock and better...
    view full answer...
  • Needing a Replacement Axle for a Small ATV Trailer
    I have a solution for you, but I do not have an single straight axle with the exact dimensions that you are looking for to fit your trailer. Instead, I recommend the Timbren Axle-Less Trailer Suspension System, like # A12WS545. The Timbren system is designed to mount to the frame of your trailer and replace the single axle with leaf springs. The Timbren system uses rubber Aeon springs for ride and load support. The system has no cross tube which will open up ground clearance underneath...
    view full answer...
  • Shipping Weight of Timbren Axle-Less Trailer Suspension System with Hubs A12WS545
    Timbren Axle-Less Trailer Suspension System with Hubs # A12WS545 has a shipping weight of 72-lbs. Figure about 3 or 4-lbs of that will be packing materials. All of our items have a shipping weight shown, just above the yellow "ADD TO CART" button.
    view full answer...
  • Timbren Axle Less System for 2k Axle Replacement with 5 on 4-1/2 inch Hubs and Off Road Config
    The 2k Timbren Axle Less kit you are looking for is the # A12WS545 which has the 5 on 4-1/2 inch bolt pattern hubs and is setup for the wider off-road tires like you mentioned. This does not require 13 inch or smaller trailer wheels either.
    view full answer...
  • Is The Timbren Axle-Less Suspension System Equipped For Use On Highway
    The Timbren Axle-Less Suspension Systems are great for both off and on road use. You can certainly use them on the highway. In order to have the 5 lug wheel bolt pattern you want, I recommend the Timbren Axle-Less Trailer Suspension System with Hubs # A12WS545 that you referenced. Because of the differences between the weight capacity of the suspension system and the weight of the cargo you plan to carry, there will likely still be some trailer bounce, as the system will not eliminate...
    view full answer...
  • Recommended Timbren Axle-Less System with 5 on 5" Bolt Pattern Hubs for Overland Trailer
    I have a solution for you, and it sounds like you're looking for a Timbren system that can be used with 5 on 5 hubs that would allow you to use Jeep wheels. Unfortunately the Timbren # A12WS545 spindle does not have any hubs with that bolt pattern, so instead you would need to use the Timbren Heavy-Duty Axle-Less Trailer Suspension - Straight Spindle - Regular Tires - 2,000 lbs # ASR2KHDS01. If you're looking for a lifted system, the Timbren Heavy-Duty Axle-Less Trailer Suspension - 4"...
    view full answer...
  • Rust Resistant Wheels Tires and Suspension For Off-Roading With Trailer
    We do offer many options of galvanized and aluminum wheels that do not rust or corrode. The Timbren Axle-less suspension system part # ASR400S02-G does not come in a galvanized option but the Timbren systems are powder coated with black powder coat to resist wear and corrosion. This kit is also made for smaller tires, so it doesn't accommodate a larger tire like you need for off-roading. I recommend Timbren Axle-less 1,200 lb suspension for Off-Road Tires part # A12WS545. This Timbren...
    view full answer...
  • Would an ATV Wheel Bolt Up to a Timbren Axle-Less Trailer Suspension System
    An ATV wheel with a 5 on 4-1/2 inch bolt pattern would bolt right up to the Timbren Axle-Less Trailer Suspension # A12WS545 that you referenced has the same bolt pattern. Your offset means the wheel would be further away from the trailer so it should clear just fine. On a trailer we strongly recommend the use of trailer wheels and tires since they are specifically designed for use on trailer and an ATV wheel is not rated for the vertical load that trailers will see. I would recommend...
    view full answer...

Do you have a question about this Trailer Leaf Spring Suspension?

  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer leaf spring suspension for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer leaf spring suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
John H
Expert Research:
Adam R
Expert Research:
Jeffrey L
Written by:
David L
Updated by:
Laura H
Updated by:
Jessie B
Updated by:
Noah M
Installed by:
Randy B
Video by:
Zach D

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 800-298-8924