Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K
(301 reviews)
Price: $1,650.29
Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K
Item # A35RS545E
Our Price: $1,650.29
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Timbren Trailer Axles - A35RS545E
- 3500 lbs
- Universal Fit
- 5 on 4-1/2 Inch
- No Drop or Lift
- Rubber Spring Suspension
- Electric Brakes
- Timbren
- Easy Lube Spindles
Get more clearance and a smoother ride. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, standard-height spindle keeps your deck height the same. Fits any trailer frame width. Includes inner (L68149) and outer (L44649) bearings.
Features:
- Delivers a smooth, stable, quiet ride - regardless of load size
- Jounce springs absorb road shock and support trailer's load
- Rebound springs minimize body roll, rattle, and bottoming out
- Built-in camber and toe-in reduce wear on your trailer's tires
- Units work independently - what affects one side of your trailer won't affect the other
- Eliminates axle beam to increase ground clearance and fit any trailer frame width
- System replaces 1 trailer axle and suspension components
- 2 Separate units bolt directly to your trailer's frame
- Designed for your on-road adventures
- Strong steel construction is built to last
- Black powder coat resists rust and corrosion
- Keeps trailer deck height the same while increasing ground clearance
- Standard-height spindle is built in
- Includes hubs (with bearings, races, and seals) and electric brakes
- Allows for simple bearing maintenance with built-in grease zerks
Specs:
- Application: single- and tandem-axle trailers that use regular tires
- Tandem-axle trailers require 2 complete systems
- Not recommended for triple-axle trailers
- Quantity: 2 suspension units (with hubs and electric brakes)
- Weight capacity: 3,500 lbs
- Bolt pattern: 5 on 4-1/2"
- Bolt hole diameter: 1/2"
- Suspension travel: 1-3/4"
- 3-Year limited warranty
Tire, Wheel, and Hub Compatibility
- Tire size: 235/85R16 or smaller
- Wheel diameter: 16" or smaller
- Bearings (included)
- Inner: L68149
- Outer: L44649
- Races (included)
- Inner: L68111
- Outer: L44610
- Seal: 10-19 (included)
- Inner diameter: 1.719"
- Outer diameter: 2.565"
Note: This Axle-Less system requires crossbeam support. If your trailer frame doesn't have a crossmember in place, you can retrofit it with one, or you can add a support by running a piece of 2" x 2" steel tubing through the square holes cut into these units. You could also add a steel reinforcement bracket to the inside of the trailer frame.
Get more ground clearance and a more comfortable ride when you're towing with Timbren's Axle-Less trailer suspension. This suspension system provides great shock absorption to comfortably get you where you need to go and to protect your precious cargo as you travel - even on rough pavement. With 2 independently operating units, you'll get better handling when making tight turns. And because this system eliminates your axle and has standard-height spindles built in, you'll get more clearance without having to raise your deck height.
Timbren Axle-Less Suspension vs. Other Suspension Systems
There are many suspension options for your trailer or camper. So, what makes Timbren Axle-Less different?
Axle-Less systems are a definitive upgrade over traditional leaf springs, in part because they allow you to do away with your thru-axle, allowing for maximum clearance. As you've probably noticed, having a leaf spring suspension means that your axle will always hang at least a few inches below your trailer's frame, resulting in limited ground clearance. This may make it difficult to navigate rough roads.
In addition, while leaf springs do a great job of supporting an even load, they may cause your trailer to bounce and rattle when it's empty or to bottom out with a heavy load. And they don't offer any type of shock absorption for a smooth ride - unless you have upgrades built in. With Timbren's Axle-Less system, gone are the days of dealing with these annoyances - this suspension is designed for a quiet, balanced ride, whether your trailer's fully loaded or empty.
A torsion axle is a step up in terms of shock absorption, and it provides more clearance than a traditional, leaf spring suspension, but that crossbeam will still hang down some. And if your torsion axle gets damaged in any way, it can't be repaired - you'll have to replace the entire thing with a setup that matches your exact trailer frame width.
With the Axle-Less system from Timbren, you won't have a low-hanging axle beam to get in the way when you're driving on rough roads. The standard-height spindles on this setup will keep your deck height the same, so you'll get that extra clearance and still be able to easily load and unload your trailer. And the rubber springs and independent operation both combine to absorb shock and deliver a smooth, easy ride. In addition, the Axle-Less system can be easily maintained over time, and it will fit any trailer frame width, so you don't have to worry about potentially ordering the wrong size like you might with other systems.
Another suspension upgrade on the market is Timbren's Silent Ride. This setup is a great option to reduce bounce and rattle because it has the same AEON rubber springs as the Axle-Less system. But the Silent Ride still requires an axle, so you won't get the same ground clearance or low deck height as you will with the Axle-Less suspension.
Timbren Axle-Less Suspension Parts
The Timbren Axle-Less suspension is designed with you in mind. All of the parts work together so you can tow your trailer comfortably - regardless of load size.
- The jounce spring supports the weight of your trailer and cargo. It easily absorbs road shock and is constructed of AEON heavy-duty, hollow rubber.
- The rebound spring delivers a smooth, stable ride - regardless of how much cargo is on the trailer. It controls the movement of the jounce spring to minimize trailer body roll, bounce, rattle, and bottoming out.
- The trailing arm with integrated hanger attaches the suspension to the side and bottom of the trailer frame.
- The control arm carries the spindle and the hub. It pivots on strong, long-lasting polyurethane bushings that never require lubrication.
- The E-Z Lube spindle is simple to grease. If damaged, it can be removed and replaced, saving you both time and money compared to a traditional axle.
- The built-in hole accepts 2" x 2" steel tubing (not included) to add support to your trailer's frame. The tubing sits higher than a trailer axle, providing additional ground clearance.
Installing the Timbren Axle-Less Suspension
The first step in installing the Timbren Axle-Less suspension is to make sure that the mounting points for each unit are directly across from each other. The easiest way to measure this is to mark the desired mounting points on your trailer's frame. Then measure the distance between these points and the center of your trailer coupler. These measurements (A and B) need to be within 1/8" to keep your trailer frame square.
Once you have your mounting points lined up, you'll be ready to install the system. Drill 3 holes into your trailer frame at the desired mounting points. Then bolt each unit to the frame with Grade 8, 1/2" bolts (not included).
Keep Your Trailer Frame Square
Because Timbren's Axle-Less system eliminates your trailer's thru-axle, you'll have to find another way to get the crossbeam support that keeps your trailer frame square. You have a few different options to do this depending on your application and how much fabricating you're comfortable doing.
If you're building a trailer, the best option is to begin building with the Timbren Axle-Less in mind and include a crossmember where you want to install the units on your frame. You can also retrofit an existing trailer with a crossmember.
If you don't have a crossmember where you want to install the Axle-Less system (and you don't want to add one), pick up a section of 2" x 2" steel tubing from a nearby weld shop. This tubing will serve as a support to keep your trailer square. It will hang only about an inch down from your trailer frame, providing more clearance than a thru-axle.
After you've mounted both of the units to your frame, you'll need to drill 3 holes into the steel tubing and into the built-in, square holes. Then, insert the tubing through the holes and secure it with 3 bolts (not included) on each side.
The last option is to fabricate a reinforcement bracket that can be attached to the inside of your trailer frame and to the Axle-Less suspension. It may be a little harder to fabricate a compatible bracket than to mount steel tubing, but you may get additional clearance with this method.
Dimensions of the Timbren Axle-Less Suspension
The following diagrams show measurements taken on the Timbren Axle-Less suspension system.
| A | B | C | D | E | F |
|---|---|---|---|---|---|
| 13" | 15" | 1" | 5" | 3-13/16" | 4-1/4" |
| G | H | I | J | K | L |
|---|---|---|---|---|---|
| 5-5/8" | 6" | 4-3/4" | 1-3/4" | 3-3/8" | 3-11/16" |
ASR3500S045 Axleless Trailer Suspension System by Timbren - Standard Height Spindle - 5 on 4-1/2" - Electric Brakes - 3,500 lbs
94545LH and 94545RH Electric Brake Hubs and Drums for 3,500-lb Axles - 1/2" Studs - Right Hand and Left Hand
Customer Reviews
Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K - A35RS545E
Average Customer Rating: 4.6 out of 5 stars (300 Customer Reviews)
Get more clearance and a smoother ride. Built-in shock absorption limits rattle and bottoming out. E-Z Lube, standard-height spindle keeps your deck height the same. Fits any trailer frame width. Includes inner (L68149) and outer (L44649) bearings.by: Fernando03/19/2024
No totally satisfied with the service I received since I wasn’t communicated on the logistic timing of sending the product out until four days after buying the products. I had to call several times to know what was goong on.. More comunication is needed.
by: Jordan Youngs06/03/2016
These axles were a perfect retrofit for a vintage tralier rebuild/mod. Service at etrailer was excellent. The parts were easy to fit with a little care. I would recommend this product and this supplier to anyone looking for trailer parts.
by: Phillip B09/27/2023
I am satisfied with the overall craftmanship of the product. But I was disappointed with the welding on the spindles. none of the weld splatter was buffed off, and the welds looked gobbed on, unlike all the other welds which look good.
by: Dan 09/08/2023
Worth the installation effort. My vintage trailer pulls better, stops better and gives me better mileage.
by: GMason08/23/2017
It looks like a wonderful, well built system.
The shipment was partial, turns out they forgot the rest. Customer service corrected the matter, still took almost 2 additional weeks to get the rest.
The packaging for shipping -
The suspension pieces should be packed individually not together. The box was torn in half and falling out, scratched up like it had fallen out of the box during shipping when it arrived.
There were no installation / alignment shims or mounting hardware in the box, don't know if they were included and missing or they forgot that as well. I found no information on the paperwork for the inventory expected to be in the box.
by: Alan 09/24/2021
Best money we ever spent! Easy to install and the towing of the trailer has changed drastically for the better in every way. Thanks etrailer for selling a tremendously great product.
by: Nate 05/28/2021
The order arrived. They seem to be using heavier grade cardboard and only the box containing the spindles was torn open at the corner. All in all a good experience. Linda was very helpful.
by: Aaron11/25/2020
Products were delivered exactly as described. The tracking information and communication during the ordering process was also above expectations. I’d order from etrailer again.
by: Mark06/08/2022
Very nice addition to my trailer. Highly recommended
by: Ryan 06/24/2021
Ride and build quality are phenomenal. Been using for a full year now, no complaints!
by: Carlos 05/19/2021
by: Daniel 03/31/2023
by: JB07/29/2022
The axle-less suspension worked very well for my boat trailer. The suspension was easy to attach to the trailer frame and provided a lower profile than the traditional leaf spring and axle system.
by: Jared01/10/2024
The service from etrailer has been great! They have been very helpful through the entire purchasing process. My one star is due to the quality of the product. First, for something as heavy duty as these are, you’d expect better packaging. On arrival, one of the spindles was sticking out of the box and the hand holds were torn on one of the other boxes. I was a little worried what I might find in the damaged box but everything seems to be intact. The disappointing part is the quality of the welds. For the price you are spending on these, I would expect a higher quality of fabrication. There is undercut in the welds that hold the three support plates together and big ol sloppy welds every where else. Unsure of what to do as my trailer has been designed around this suspension system.
by: Jon03/14/2023
I purchased the 3500 lb. set w/4" drop. Wish they made a 2" drop. Install was fairly easy, but most of your time will be consumed with alignment measurements, acquiring shims, and making adjustments. I was lucky to have a very square trailer frame. However, the "slop" in the all of the mounting bolts (especially, the spindle mounts) is more than the 1/8" window they specify. You will want to preload all bolts before tightening, and then measure for alignment/toe-in. The units are supposed to have camber built-in, but it's not near enough (more shims). Also, this suspension has more travel then the documents indicated. I had to re-mount my fenders 1" higher to keep the tires front hitting. When fully loaded, you might have 1" of travel left. All that being said, the ride is better than I anticipated. It's less bouncy than a torsion axle, and very quiet. If I was building a trailer from scratch, I would use this system, again.
by: Matthew 01/17/2023
It is important to know that your wheels are going to sit very tight to the trailer frame. I needed to add an extension to the hub for it to clear the sides of the camper I built.
by: Michael 04/26/2024
We made an amazing creation out of those two axle-less axles.
We made a large fuel cell that is used for offroad use and it has worked excellent this entire time.
They are really great products and we would love to work with them again.
Actually, we do a ton of social media stuff and youtube and if you ever have interest in sending us products to build content around, I would love to have the opportunity!
Thanks,
Michael Brandt
Garage Bound, LLC (On Youtube and Instagram and all the other socials)
by: Kevin06/02/2023
Very smooth pull. I'm very impressed on how the trailer pulls. My traditional axle trailer seemed to bounce a lot on the highway which made a lot of noise, but with the Timbren Axle-less that I installed on a new trailer, the trailer is so smooth and way less noise.
Great product.
by: dale04/21/2021
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.
by: Kelly F11/07/2018
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!
by: Jake08/21/2023
Installed the Timbren Axle-less suspension a little over a year ago and approximately 5000 miles ago. I have been extremely satisfied with the installation and performance thus far and have had no issues. I also chose to install an optional crossmember for more strength using a 1/4" thick piece of 2x3 steel. I had to increase the weight capacity of my campers suspension due to renovating the interior completely and adding more weight. I also strengthened the frame to accommodate the extra weight. In addition to installing the Timbren 5200LB system I installed new 12" electric brakes and upgraded to 225/75R15 tires with E load range rating.
by: Jake08/18/2023
Installed the Timbren Axle-less suspension a little over a year ago and approximately 5000 miles ago. I have been extremely satisfied with the installation and performance thus far and have had no issues. I also chose to install an optional crossmember for more strength using a 1/4" thick piece of 2x3 steel. I had to increase the weight capacity of my campers suspension due to renovating the interior completely and adding more weight. I also strengthened the frame to accommodate the extra weight. In addition to installing the Timbren 5200LB system I installed new 12" electric brakes and upgraded to 225/75R15 tires with E load range rating.
by: Chris07/02/2021
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.
by: Quintin01/05/2021
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
by: David Johnson09/24/2019
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.
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view full answer... - Replacement Parts for Timbren Axle-Less Suspension System A35RS545EThank you for your many purchases from etrailer. We appreciate your trust and repeat business. You purchased the Timbren axle-less suspension kit with brakes and straight spindles, part # A35RS545E. The bearings used in this kit are inner # L68149 and outer # L44649. Inner race is part # L68111 and outer race is part # L44610. The 10-19 grease seal is part # RG06-050, sold as a pair.
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view full answer... - Recommended Timbren Axle-Less Suspension for 3,100 lb Off-Road TrailerIf your trailer has a GVWR (gross vehicle weight rating) of 3,100 lbs then you definitely want to go with 3,500 lb axles like the Timbren Axle-Less Trailer Suspension System # A35RS545E you referenced. This doesn't really have to do as much with accounting for bumps as it does with just the general weight of your trailer. As long as your suspension components are rated for at least the GVWR of your trailer then you are good to go. The manufacturers keep things in mind like bumps when...
view full answer... - Recommended Timbren Axle-Less Suspension System for Camper TrailerTimbren axle-less suspension kits like # A35RS545E, which is rated for 3500-lbs and that includes electric drum (not disc) brakes, can make trailer fabrication a lot easier since they bolt or weld directly to the trailer's frame. This 3500-lb kit is the highest-rated kit that includes electric brakes. We also offer a similar kit with 4-inch drop spindles that allow the trailer to sit lower, part # A35RD545E. Note that two sets of Timbrens can be used together, as in a tandem axle set-up. In...
view full answer... - Timbren Axle-Less 3500-lb Suspension System for Off-Road Teardrop TrailerWe offer two Timbren axle-less systems rated for 3500-lbs, part # A35RD545E which has spindles with a 4-inch drop, and part # A35RS545E which would be better for your application since it will not reduce your ground clearance. For off-road use you do not want to use a kit that has drop spindles; this type is better for a ramped trailer where you want a low deck height. Kit # A35RS545E includes the frame-mount suspension assemblies, E-Z Lube spindles with 4- bolt brake flanges, hub/drums,...
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