Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K
(288 reviews)
Price: $1,505.05
In Stock
Timbren Axle-Less Trailer Suspension w Electric Brakes - Standard Duty - No Drop - 5 on 4-1/2 - 3.5K
Item # A35RS545E
Our Price: $1,505.05
In Stock
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- Reviews (288)
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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 (288 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: Al11/07/2023
Five star. shipping was slow. Product was great 14 K 14 plies under 2000 pounds independent suspension. Low fast and sassy. Yep that’s how I build them.
by: James09/06/2022
Incredible system. Handled our Overland trek through Colorado and Moab. These axles on our 1917 Ford bed ran multiple Jeep Badge of Honor trails. The suspension handled flawlessly. Handles off camber rocks and drop offs smoothly. We ran the 4 inch lift and off road offset to fit the factory Jeep wheels.
by: Brian12/01/2022
I put these on an off-road trailer build. They have been fantastic! I've done many miles and they held up great. Highly recommend.
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: Doug F.06/22/2016
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.
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: Elizabeth11/17/2021
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.
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.
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.
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view full answer... - Electric Brake Hub/Drum Included with Timbren Axle-Less Suspension System # A35RS545EThe Timbren Axle-Less Suspension System you referred to, part # A35RS545E includes the following: Aeon Spring Assemblies EZ Lube Spindle Assemblies Castle Nuts and Washers for Spindles Inner and Outer Bearings Inner and Outer Races Grease Seals EZ Lube Grease Caps 5 Lug on 4-1/2 Bolt Circle Brake Drum Electric Brake Assemblies I have taken a photo from the product description page that shows everything that is included.
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view full answer... - How Much Clearance Do I Need Between My Tire and Fender?You are going to want a minimum of three inches of clearance between the top of the wheel and the bottom of the fender when fully loaded. I have attached a diagram that shows the deflection of the Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - Straight Spindle - 3,500 lbs item # A35RS545E you referenced purchasing. This system will travel up to 1-3/4" before the AEON progressive-rate main spring makes contact. Once this spring makes contact it will not travel anymore....
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view full answer... - Available Beam Axles and Axle-Less Trailer Suspension KitsIn some certain cases you might use an axle that is longer than the width of the trailer frame, such as if larger fenders or other structures cover that extra axle length. But usually you will want the axle length to be a closer fit. The axle spring seats may not be in the right places on the axle beam if the trailer is much less wide. Matching an axle's weight rating for the gross trailer weight is critical to ensure the axle is not overloaded. On the linked page you can see both beam...
view full answer... - How Much Clearance Should I Have Between Tire and Trailer FrameWe recommend to have at least 2 inches of clearance from the tire to the trailer frame and 3 to 4 inches of clearance from the top of the tire to fender to accommodate for suspension travel. If you plan on using Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs part # A35RS545E then the hub face will sit 6" from the frame. You would need a tire with a section width no larger than 8 inches to have the proper clearance.
view full answer... - Recommended Axles for 68 Inch Hub Face to Face Dimension with Electric BrakesThat specific axle length would require using the Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - Straight Spindle - 3,500 lbs # A35RS545E or a similar axle-less system. This kit comes with the electric brakes, hubs with 5 on 4-1/2 bolt pattern, as well as the integrated suspension. You simply bolt the assemblies on and use a 2 inch square bar (not included) cut to your custom length to use in the integrated holes of the assemblies. I've also linked the other options...
view full answer... - Availability of Replacement Axle for 1999 Trailstar Bass Tracker Boat Trailer I may have a solution for you, however we do not have a standard axle available that matches the dimensions on your current unit. I recommend taking a look at a Timbren Axle-Less System to replace the axle on your Trailstar Bass Tracker Trailer. This will provide a smooth ride, can eliminate the need for a thru axle, and will fit any frame width. For a 3,500 pound kit that includes electric brake hubs, I recommend the Timbren Axle-Less # A35RS545E. These suspension units will replace...
view full answer... - Does 3.5K Timbren Axle-Less Trailer Suspension System Come with Self-Adjusting BrakesYes, the electric brakes that come with the Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs # A35RS545E are self-adjusting so you'll only need to do that initial adjustment then you'll be good to go! The initial adjustment is just making sure there is a slight drag when you freely spin the wheel. If you have too much drag or too little drag then the self-adjusting feature might not work correctly. Attached is an installation video of the basic Timbren system for you...
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David L
Installed by:
Cole B
Installed by:
Randy B
Video by:
Zach D
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