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 - Spindle Only - Off-Road Tires - 1,200 lbs

Timbren Axle-Less Trailer Suspension System - Spindle Only - Off-Road Tires - 1,200 lbs

Item # ASR1200S01
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Our Price: $501.24
Trailer Leaf Spring Suspension
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Shipping Weight: 60 lbs
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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 - Spindle Only - Off-Road Tires - 1,200 lbs part number ASR1200S01 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Why etrailer?

Timbren Trailer Leaf Spring Suspension - ASR1200S01

  • Axle Replacement System
  • Axles
  • Universal Fit
  • 1200 lbs
  • Spindles Only
  • Timbren

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 accept trailer hubs (sold separately)
    • EZ Lube feature makes it easy to grease bearings without removing the hub
    • Spindles can be removed from units for simple replacement if damaged
  • Heavy-duty steel construction with black powder coat finish resists wear and corrosion
  • Easy to install and align
    • Bolt or weld to your trailer's frame


Specs:

  • Fits: 1-axle and 2-axle trailers that use 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
  • Weight capacity: 1,200 lbs
  • Quantity: 2 suspension units without hubs
    • Works with Dexter 1,000-lb hubs (8-91-05UC1-EZ)
  • 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 is not included with this model.
  7. The built-in square hole accepts standard 2-inch tubing. If there is no crossmember above the suspension, you can easily add support to your trailer's frame by inserting 2-inch steel tubing through the hole on each suspension unit and then bolting the tubing into place.

Timbren Axle-Less Suspension versus Leaf Springs

Leaf Spring Example

The Axle-Less suspension's progressive spring is a definitive upgrade over leaf springs. Although leaf springs deliver a stable ride when supporting a load, a trailer with leaf springs will bounce and rattle when it's empty or supporting a light or off-center load. On the other hand, your trailer can bottom out on bumpy roads if the load is too heavy. The AEON progressive-rate springs of the Axle-Less suspension always deliver the same reliable performance, no matter the load size. As more weight is added to the trailer, the springs compress and become stiffer, offering more support for heavy loads. And because they rebound more slowly than leaf springs, the AEON springs do a better job of absorbing road shock, thereby keeping your trailer from bouncing and rattling when you're carrying a light load. So with this versatile system you will enjoy a smooth ride whether you're towing an empty trailer or a hefty load.


Unlike leaf springs, Timbren's Axle-Less suspension units operate independently of one another. Each spring activates only when needed. This reduces roll and delivers top-notch performance, even when you're hauling off-center loads. When your trailer with leaf springs takes a turn, one side of the suspension compresses and takes on more weight, and the other side becomes looser and bounces. This causes rattle and can make the trailer lean to one side. But when your trailer with the Axle-Less suspension takes a turn, one side compresses and becomes more rigid to absorb the weight, and the other side expands to normal height to help steady the load and minimize bounce and rattle. The load stays better balanced, even if it is off-center.


Timbren Axle-Less Suspension versus Torsion Axles

Torsion Axle Example

Timbren's Axle-Less trailer suspension system is a great alternative to torsion axles. While both systems allow either side of the trailer's suspension to operate independently, only Axle-Less suspensions are actually separate units. Torsion axles still require a bar that spans the bottom of your trailer, whereas Timbren's system can eliminate the need for a thru axle - giving you the same amount of ground clearance from the front of your trailer to the rear. It also allows Axle-Less suspensions to fit any trailer width - unlike torsion axles, which have to be fitted to an exact frame width.


Axle-Less suspensions operate in a smoother, less stressful manner than torsion axles. Torsion axles use a twisting motion, where the bar inside the axle tube rolls against rubber cords or a rubber wall to create compression and resistance. The up-and-down motion of the main spring and the side-to-side motion of the rebound spring in Timbren's Axle-Less suspension work together to provide smooth, consistent compression - with no twisting - that results in a better ride and less stress on the suspension's components.


Installing the Timbren Axle-Less Suspension

Whether you are building a trailer or retrofitting your existing trailer with the Axle-Less system, you must make certain that the trailer's frame is both perfectly square and sturdy enough to support a heavy load without the aid of a thru axle.


Install Option 1

There are three ways to install the Axle-Less suspension. The easiest method, which is recommended if you are replacing axles on your trailer, is to install a piece of 2-inch-square tubing (sold separately - available at most weld shops) through the integrated hole in the Axle-Less suspension. Then all you need to do is bolt the suspension to the side of the trailer's frame with three bolts (not included).


Install Option 2

The second option for installation is to fabricate an inboard extension plate that attaches the trailer's frame to the Axle-Less suspension.


Install Option 3

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


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


Measuring Diagram

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


Dimensions of the Timbren Axle-Less Suspension

Dimensions 1

Dimensions 2

Dimensions 3
Timbren Dimensions 4



ASR1200S01 Axleless Trailer Suspension System by Timbren - Without Hubs - Wide Tires - 1200 lbs






Customer Reviews

Timbren Axle-Less Trailer Suspension System - Spindle Only - Off-Road Tires - 1,200 lbs - ASR1200S01

Average Customer Rating:  4.7 out of 5 stars   (195 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.

- ASR3500S05
by:

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


Trailer suspension and disk brake performance is outstanding big big difference over leaf spring and electric drum brakes. Installation required modifications to the frame to monut the timbren suspension


Comments
The Timbren axle less suspension and Disk brake and disk brake controller system is still work great. will never go back to drum brakes or leaf spring axle suspension.
Quintin - 01/06/2022


- TASR7KS02
by:

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


They have more pros than cons, but the second set I bought broke the flat plate that holds the spindle at about 8 months. The steel quality seemed less than I would expect since it basically peeled it back like a pop can as you can see in the pictures. Otherwise I like the clearance and ride. They last 2-3 years where the torsion axles I replaced would wear out in 4 months after driving down rough gravel roads. There is a grade zerk on the underside which I didn't realize until I bought the second set. That would have helped the first set last longer had I known about it.


Comments
The Timbren Axle-Less Trailer Suspension - 4 Spindle w Brake Flange - Regular Tires - 7K Part # TASR7KS02 has a 3-year limited warranty. I will have Customer Service reach out to you.
-- Etrailer Expert Thomas M - 12/22/2021


- A20RS545
by:

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


I used these axles in a different way than most would. I needed a trailer that was small, could handle tight switch-backs, carry 600 lbs and be light. I had this idea and as a retired design engineer I saw a great possibility in this axle. I have made four of these trailers now, one as a camp trailer, 2 for trail work for State Parks and one as a utility trailer.


Comments
Really cool work!
-- Etrailer Expert Sierra K - 07/07/2021


- ASR3500S06
by:

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


The trailer rides great down the road and no more worries about saltwater and rusty leaf springs. Not a cheap option but I’m very happy with the setup. When installing, just be sure to measure accurately and have sharp drill bits. A drill press type of guide also helps ensure correct drilling angles. The first picture is of a mounting gusset a local welding shop made. One is needed for each side and necessary to provide needed mounting strength-at least on my trailer frame. Pics 2 and 3 show the mounted suspension on one side of the trailer. Pic 4 shows the suspension on one side of the trailer with the axle attached and a separately purchased disc brake assembly mounted on it. Finally, pic 5 shows a 2” box channel between both suspension assemblies. Independent suspensions would have been nice, but I wanted to ensure trailer rigidity was maintained. So, after one year, so far, so good. It’s all smooth sailing down the highway.



- A20RS545
by:

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


I am not a mechanic so Brandi was real helpful. Had to get some professional help to remove the old suspension and install the new suspension. The only drawback we ran into was the spindle did not extend out far enough to mount the tires in the normal way. We had to put the tires on backwards. It all worked out beautifully. Towed the trailer for over 1700 miles without any problems. Brandi was delightful to talk with and very patient with me. Her help was most appreciated. Sorry, I didn't take any pictures.


Comments
good
R C - 12/19/2021


- TASR5200S03
by:

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


Very exicited about these axels, I have been eyeing these for over a year. (Excellent service from etrailer, they had my parts to me in 1 day from the time of placing the order.) These axles seem to be well made and fit nicely with the Dexter hub and drum assembly and the 12" electric brake kit. I installed this all on a M1101/M1102 trailer frame after removing the factory axel assembly. I have not ran these on the road or off as of yet but will give another review at that time. The fit and finish are great and the packaging was good, a little banged up from shipping (missing 1 washer)



- ASR3500S06
by:

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


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


Comments
Its been a year and this suspension is still doing great!
David R - 09/27/2021


- TASR5200S03
by:

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


This is as close to a bulletproof suspension as they come. We use this suspension on all of our VORSHEER XOC trailers. They have performed flawlessly as an off-road suspension.



- ASR3500S05
by:

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


Timbren saved our RV road trip! The leafs on the axle on our 2018 Jayco TT came apart while driving in Maryland. We tried going to the manufacturer, but they were useless. Going to a RV mechanic meant being grounded for at least 2 months. Then we found Timbren. With the help of Timbren's excellent staff we purchased axle-less system through etrailer, who made sure we got as quick as possible. It came ahead of schedule, my husband installed the Timbren system and we were back on the road! The axle-less system is better than the original manufacturers. If you plan on taking your RV or TT farther than 100 miles GET THIS INSTALLED and get it through etrailer.



- A35RS545
by:

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


I rebuilt a 4 x 8 trailer using the Timbren Axle-Less Trailer Leaf Spring Suspension and it works great. I would recommend it to others.


Comments
Working out just fine.
David J - 09/25/2020


- TASR5200S03
by:

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


I installed these on my single axle travel trailer to replace the axle and leaf springs. Weight savings was a wash with the required steel tube for added stability. I installed on an I-Beam using aluminum plate as a spacer. It took my friend and I 3 days to install everything. The hardest part was rerouting my black pipe propane line. I also had to install it just back of center due to a steel cross beam being in the way of the middle bolt hole. I replaced the brakes and hubs as well as the wheels to match the new hubs. Overall we've been super happy with this upgrade. The trailer rides a lot smoother. I'm not finding random screws on the floor after a long bump ride. We decided to do this after our leaf spring broke 2 times, 12k miles between. We were done dealing with a subpar suspension. I probably would not recommend doing this if your leaf springs are working for you. We put a lot of miles on our trailer. We aren't weekend campers.



- ASR35HDS05
by:

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


Fast service from etrailer sending me my Timbren kit. They are always very helpful. Unfortunately it looks like UPS mishandled one of the 3 boxes and had to re-tape it all over. I just rcv'd the shipment, so I will have to open the box when I get home and make sure everything is inside. This is no fault of etrailer, just the shipping companies these days.


Comments
I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 11/21/2021


- ASR3500S06
by:

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


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



- A4WS440
by:

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


Pleased with ETRAILER, will order here again. Not as happy with the torsion axle setup. 2 inch square opening for tying both axles together with your own 2" square tubing are not shaped to match 2x2x1/8 tubing. Grinding and welding of tubing required to make it fit. Also found the overslung stub axle left the end of the pivot arm without much ground clearance though the unit was intended and spec'd for atv tire off road use. A pivot arm with mounting pads top and bottom would be better and allow the user to choose high or low clearance use. I found the units were perfectly suited to offroad use once I fabricated new mounting pads and welded them to the bottom of the arms.


Comments
After a year of off road use, I couldnt be happier. My trailer rides smooth loaded or unloaded. No of that bunny hopp with leaf springs or rigid mount axles. The small rebound control snubber works perfectly! I modified my components for high clearance but the concept is sound, they work well. Great job Timbren!
Doug F - 06/22/2017



- A12WS545
by:

Review from a similar Axle-Less Suspension 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!


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



- ASR1200S04
by:

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


The order came in on time and the customer service at etrailer.com (Ashley) and Sean from Tmbren was outstanding. They both were very helpful in my choosing the right product for my needs. The axle less suspension's performance is absolutely superb. It vastly improves ride quality. I am using it on a teardrop camper that often goes on gravel roads and the raddling sound from the leaf axles was horrible. A couple of points to consider before you settle on the axle less suspension: keep in mind that you will lose some hight of the trailer. While you will gain clearance from the lack of the axle, the suspension will make the trailer sit lower than before.i had to lower my hitch by an inch to maintain the trailer leveled. Also it does appear to compress at higher rate than the leaf springs, which makes it softer but easier to reach it's limit. Overall this product is absolutely a must if you are looking to improve the safety and the quality of your towing.



- ASR1THDS01
by:

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


After a great deal of research, I ultimately chose the Timbren long arm kit to replace the torsion axle under my teardrop trailer. My initial impression is that there is simply no comparison between the two. It now rides better, pulls better and handles better than I could have imagined. The Timbren axle system is incredibly well built and is much more confidence-inspiring. While the spring rate closely matches my trailer weight, the components are much more rugged and robust. The spindles, bearings and brakes are rated at double the capacity of my old axle which gives me great peace of mind. I pull my trailer, both on and off road, anywhere it will fit and the long travel and heavier components are a game-changer for my travels. Installation, while requiring a bit of forethought, was otherwise straightforward and methodical. Documentation available from etrailer and Timbren, is second to none. Instructions were clear and concise with drawings and detail taking the major guesswork out of the equation. Even though, due to the odd frame design of my trailer that required a bit of work to adapt, I ended up making some frame stiffeners, the adaptation was as simple as it could possibly be. I've ordered from etrailer in the past and they were 100% accurate on this order as well. I ordered the Timbren kit without backing plates and hubs due to the requirements of my trailer and etrailer suggested, explained availability and supplied all of the components I needed. They truly a stress-less bunch of folks with an extraordinary website. I'll no doubt turn to them again...



- ASR3500S06
by:

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


You guys are awesome! Great how to vi deos.


Comments
Great
Zac - 12/08/2021


- A20RS545
by:

Review from a similar Axle-Less Suspension 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.



- ASR1200S02
by:

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


It was a very straight forward install, it goes pretty smooth if you take your time, double check your layout, Make sure of your bolt sizes (length) before going to the store. If you plan the project, don’t rush, its not a race, it goes really good. I spent about 10 hours spread over two days by myself. I am just waiting for tires to arrive. All that said very happy with the product and etrailer. Will recommend for any axel/suspension replacement.



- A20RS545
by:

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


Put these on our teardrop camper about a year ago and have about 3000 miles on them. Smooth and quiet and awesome ground clearance. Would definitely recommend these over a conventional axel.



- A35RD545
by:

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


enclosed are pics of trailer and spindle units. I was very happy with the end result, lowering ez loader trailer 8 inches for hovercraft. the spindle units were well made, very strong but had some weld repairs as pictures show.i could not set the needed adjustments till I cleaned up the units with a stone and file. also please improve the packaging . these heavy units need something better than cardboard for shipping. they were dislodged from Styrofoam and partially poked holes thru cardboard. but fortunately no damage there. again im happy with the installation.thank you!!!



- ASR3500S06
by:

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


Came late. Not e-trailers fault. Covid-19 and China's fault. They bolted right up on my trailer frame. Really like the way they make my tear drip trailer handle. No sway, no bouncing all over like it use to. Will always put these under any trailer I build from now on. E-trailer keep up the great work.



- A20RS545
by:

Review from a similar Axle-Less Suspension 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



- ASR3500S06
by:

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


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


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Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • Replacement 1200 lb Axle for Starcraft Starflyer Pop-Up Camper
    We don't offer replacement torsion beam axles, but we do offer the Timbren Axle-Less suspension that typically doesn't require an axle beam and won't require leaf springs, which could be a good solution for you. My research indicates that the Starflyer weighed around 1200 lbs. If the ID tag on your pop-up confirms this, we offer some Timbren Axle-Less suspension systems that would work for you. For the system with 4 on 4 bolt pattern idler hubs included, I'd recommend the # A12RS440....
    view full answer...
  • Available Hubs for Timbren Axle-Less Trailer Suspension System ASR1200S01
    It is not recommended to use auto wheels or tires on a trailer. Trailer wheels and tires are constructed to handle the vertical loads of trailer cargo while passenger vehicle wheels and tires are designed for the handling requirements of highway driving. Timbren kit # ASR1200S01 uses bearing L44649 for both its inner and outer bearings. You can select hubs to fit this (or any other) spindle by matching up the bearing numbers. A new hub has to use the same bearings as those originally...
    view full answer...
  • Do the Timbren Axle Less Systems Have a Camber When Installed
    We do too! When setting up suspension on a trailer with a Timbren Axle-Less Trailer Suspension System # ASR1200S01 (or any system for that matter). It is very important to make sure everything is set up properly. The Timbren suspension system, like # A20RS440, is designed to be toe-in when there is no load on it. So when the load is placed on it it will push the tire out so that it is riding straight on the ground. Provided the trailer is not overloaded and the tires are trailer tires...
    view full answer...
  • Is Timbren Axle Less Weight Capacity Per Axle Set
    The Timbren axle-less kits like the # ASR1200S01 that you referenced are rated per axle or set. So with just the # ASR1200S01 you'd have axle capacity of 1,200 lbs or with two of these you'd have a capacity of 2,400 lbs. This kit was designed to be used with wider off-road tires like your trailer has so it would be the best option in that regard as well. I attached a review video for this kit for you to check out as well.
    view full answer...
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  • Recommended Axle-Less Suspension System For Lightweight Off-Road Trailer
    Since you want to travel off-road I recommend the Timbren Axle-Less System, part # ASR1200S01. This is designed for off-road tires and has a capacity of 1,200-lbs. The hub assembly I recommend is part # 8-91-05UC1-EZ. This system does not have the same bolt pattern as your Tacoma. This hub has a 4 on 4 wheel bolt pattern. Since you said you want to match the 6 x 5-1/2 bolt pattern of your Tacoma you will need to use a more heavy-duty system like part # ASR35HDS01. This is a 3,500-lb...
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  • What is the Total Weight Capacity for the Timbren Axle-Less Trailer Suspension System # ASR1200S01
    The 1,200 pound capacity listed for the Timbren Axle-Less Trailer Suspension System, # ASR1200S01, is for the pair. If you need a higher or lower capacity system we carry numerous options. I have included a link to the options for you to view.
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  • Axle to Convert Harbor Freight Haul-Master into Off-Road Trailer with More Clearance
    All of our traditional axles are not going to give you any lift on your trailer. However, the Timbren Axle-Less Trailer Suspension System # ASR1200S01 gives you more ground clearance by not using a cross tube axle. This system uses a rubber spring suspension and is a universal fit for any width trailer. This particular model is specifically designed for off-road tires as well. We don't have any axle-less systems with a 5 on 5 bolt pattern however, we do have 5 on 4-1/2 and, like the...
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  • Using Timbren Axle-Less Suspension to Build a Trailer for On and Off-Road Use
    If you consider that a Timbren axle-less suspension system such as # ASR1200S01 has just one moving part compared to leaf spring suspension that has multiple pivot points and the advantage, at least from that standpoint, is clear. Fewer moving parts means fewer potential issues. Only the lower jaw part will pivot on that large bolt and while it doesn't have a grease fitting it would be easy to lubricate it since the units can be taken apart relatively easily. That would help protect...
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  • Timbren Axle-Less Suspension, Hubs, and Wheels to Match a 2012 Jeep Wrangler Rubicon
    Timbren Axle-Less suspension system, # ASR1200S01, is a complete kit, left and right side. The hub that fits this system is # 8-91-05UC1-EZ. It is sold by itself so you would need 2. The largest wheel you could put on this hub is a 12 inch with a 4 on 4 bolt pattern. I have included a link to all of the wheels that fit this description. Trailer wheels and vehicle wheels are different and you wouldn't use them interchangeably. Basically we might have some wheels that are close to...
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  • Replacement Spindle Assembly for Timbren ASR1200S01 Axle-Less Suspension
    The replacement spindle assembly for the Timbren # ASR1200S01 Axle-Less Suspension is available as part # P021. The mounting hardware, 4 bolts, 4 nuts and 8 washers are included. You'd need to order this part directly from our Customer Service folks. You can reach them at 800-298-8924.
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  • Can Timbren Axle-Less Suspension System Fit on a Single Axle Trailer to make a Tandem Axle Trailer
    You can add the Timbren Axle-Less Suspension System, # ASR1200S01, to your trailer in combination with your current axle, but there are a few factors that you will want to consider first. To add this system to your trailer, you will need to move your current axle either forward or backward to ensure that the weight of the trailer and any load is distributed to both axles properly. I have attached a diagram that explains how to find the correct axle spacing for a tandem axle trailer...
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  • Can Non-Offroad Tires/Wheels be Used on Timbren Axle Less Kit for Off-Road Tires
    Yes you can put regular wheels/tires on the Timbren Axle-Less Trailer Suspension System # ASR1200S01 that you mentioned like what it sounds like you have. The difference between the off-road and non-off-road Timbren Axle Less setups is the distance difference between where the assembly attaches to the trailer frame and where the wheel will be held on the spindle as the off-road setups have a bit more distance there to allow for additional tire clearance. This has a 1,200 lb axle capacity...
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  • How Do The Timbren Axle Less Systems Attach to Trailer Frame
    I spoke with my tech contact at Timbren and he informed me that the Timbren systems have weld nuts attached to those top holes on the upper bracket. Drill a clearance hole in the frame of your trailer that lines up with the holes of the Timbren and then thread the bolt in to the Timbren. No disassembly is required.
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  • Hub Recommendation for Timbren Axle-Less Trailer Suspension System # ASR1200S01 for a 8 inch Wheel
    The recommended hub for the Timbren Axle-Less Trailer Suspension System # ASR1200S01 is the Trailer Hub Assembly # 8-259-5UC1-EZ which can be used on an 8 inch wheel with a 5 on 4-1/2 inch bolt pattern like the Kenda 4.80/4.00-8 Bias Trailer Tire with 8" White Wheel # AM30020.
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  • What is the Deflection for the Timbren 1200 lb Axle-Less Trailer Suspension Systems
    According to my technical contact at Timbren, the Axle-Less Trailer Suspension System # ASR1200S01 has a deflection of 2-1/8 inches. He also told me if you are running right at 1200 lbs you would be better off installing the 2000 lb system. I have attached a link to take you to all of the 2000 lb systems we offer. The deflection of a 2000 lb system is 1-5/8 inches.
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  • Timbren Axle-Less Suspension System For A Homemade Overlanding Off Road Trailer
    I would not trust the Timbren Axle-Less Trailer Suspension System # ASR1200S01 to be used as an overlanding trailer with those large jeep wheels. I have included a picture that shows what I believe to be a failure point with this suspension. With that narrow point I would fear that a large bump may cause it to bend with the weight and larger wheels. I recommend the Timbren Axle-Less Trailer Suspension System # ASR1THDS02. It has a higher weight capacity at 2,200lbs and larger axle spindles....
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  • Why Does HD Version of Timbren Axle-Less System Use Standard Bearings
    The bearings are the same as they are related to the capacity of the axle and the the size of spindle that is called for based on that. The heavy duty portion of the setup is more related to the clearance that allow for more ground clearance and tire width clearance. Not sure how to defend the EZ lube setup as being a weakness as we have not see that to be the case at all, but almost all of our trailering customers are using the trailers on the highway and the application may be less...
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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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  • Recommendation to Replace Axle on 1987 MC Scow Sailboat Trailer
    For a replacement axle on your boat trailer, I recommend looking at a Timbren Axle-Less System like # A12WS545 that comes with hubs. This suspension unit will replace your existing axle and spindles and will fit any frame width. The easiest method for installing this system since you are replacing an existing axle, is to install a piece of 2-inch-square tubing through the integrated hole in the Axle-Less suspension. Then you will just bolt the suspension to the side of the trailer's frame...
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  • Available Small Wheel Bearings and Wheel Bearing Kits for Trailers
    We do offer bearings as individual parts as well as part of kits that also include races, a grease seal, etc. An example of such a bearing kit is part # BK1-100. The # L44643 bearings in this kit have an inner diameter of 1.00-inch. The smallest bearing we offer is part # LM11949 which works with race # LM11910. This bearing has an inner diameter of 0.750-inches. It usual application is as an outer bearing for an agricultural hub. You can use the linked page to see all bearings, races...
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  • Adding Off Road Tires to a Trailer That Has Standard Tires
    With the standard 4.80-12 tire having a section width of 4.7 inches and the Arisun LHAWG125JL12MB having a section width of 10 1/2 inches, it would exceed the space you have on the trailer. That being said, if you wanted to go with this tire and wheel combo, there is a solution to get the added room. The Timbren Axle-Less Suspension set up # ASR1200S01 is specifically designed to be used with larger, beefier off road style tires. As this would replace your current axle, you should check...
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  • Shipping Weight And Weight Capacity Of 400lb Timbren Axle-Less Suspension System W/ Hubs
    The total weight of the Timbren Axle-Less Trailer Suspension System with Hubs - 4 on 4 - 400 lbs # A4RS440 you were looking at is 62lbs. The 400lb capacity listed is the total capacity of the one axle, or pair. If your trailer is heavier than this rating you will need to step up to the next model which is the Timbren Axle-Less Trailer Suspension System - Spindle Only - Off-Road Tires - 1,200 lbs # ASR1200S01 which will offer a 1200lb weight capacity. The # ASR1200S01 does not include...
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  • Recommended Axle-Less Suspension For Off-Road Trailer
    The Timbren axle-less systems do accept standard size hubs. The axle-less systems we offer jump from a 400-lb to a 1,200-lb or larger. To make it easier you may want to consider an axle-less system that has the hubs included. The # ASR400S01 system you came from is designed for off-road tires and will work with an idler hub like part # 8-91-05UC1-EZ. The # # 8-91-05UC1-EZ comes with the bearings, races, seal, grease cap, wheel bolts and lug nuts included. The axle-less system with hubs...
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