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Timbren Silent Ride Suspension for Single Axle Trailers w/ 3" Round Axles - 3,500 lbs
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Timbren

Timbren Silent Ride Suspension for Single Axle Trailers w/ 3" Round Axles - 3,500 lbs

Part Number: TSR3500S06
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$527.13
Retail:$585.70
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Trailer Suspension Parts
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Rubberized, pivoting trailer suspension system replaces your leaf spring suspension to provide a smooth ride. Pivoting arms help keep your trailer level on rough ground. Fitted rubber springs absorb road shock and eliminate bounce and rattle. Great Prices for the best trailer suspension parts from Timbren. Timbren Silent Ride Suspension for Single Axle Trailers w/ 3" Round Axles - 3,500 lbs part number TSR3500S06 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Suspension Parts - TSR3500S06

Highlights

  • 3,500 lb Weight Capacity: Supports single-axle trailers with steady handling under load.
  • Aeon Rubber Springs: Absorb shock and stiffen with weight for a smooth, stable ride.
  • Pivoting Arms: Keep the trailer level so all tires stay in contact over rough terrain.
  • Virtually Maintenance-Free: Rubber design needs no lubrication and resists wear.
  • Heavy-Duty Steel Build: Powder-coated for long-term durability against rust and damage.
  • 5-1/4" Frame-to-Axle Drop: Helps gauge ride height change versus a torsion or leaf setup.

Features to know about

Smoother Rides on Every Road: Aeon Rubber Springs Absorb Shock

Rough or uneven roads can wear you out fast when your trailer bounces and rattles over every bump. This suspension system replaces leaf springs with Aeon progressive-rate rubber springs that instantly react to the road. They absorb shock and vibration to keep your trailer stable and quiet, no matter if it’s empty or loaded. As weight increases, the rubber compresses and stiffens to support the load while keeping the ride smooth and controlled.

Keeps the Trailer Level: Independent Pivoting Arms Balance the Load

Hauling off-center cargo or driving on uneven ground can make a trailer lean or sway. The silent ride setup uses independent pivoting arms that let each side of the suspension move on its own. This keeps all tires in contact with the road and helps the trailer stay level through corners or rough terrain. The result is steady tracking and better control when conditions get challenging.

Strong Construction That Lasts: Heavy-Duty Steel and Rubber Build

Built to handle hard use, each suspension unit combines heavy-duty steel with long-lasting rubber components. The powder-coat finish resists rust, and the fitted rubber bushings keep the arms fully engaged at all times. The design is virtually maintenance-free, so you can head out knowing the system will keep working smoothly mile after mile.

Timbren Silent Ride 3,500-lb single-axle trailer suspension system showing dual steel units with rubber springs designed for 3-inch round axles

Simple Upgrade from Leaf Springs: Bolt- or Weld-On Installation

Swapping out worn leaf springs doesn’t have to be complicated. This system bolts or welds onto a 2" x 2" hollow steel crossmember with 3/16" wall thickness (not included) and uses Grade-5, 5/8" bolts for bolt-on setups. The included axle seats are welded to your 3" round axle, giving you a solid connection that’s ready for long-term service.

Built for Lasting Dependability: Rated for 3,500 lbs

Designed for single-axle trailers with a 3" diameter axle, the system supports up to 3,500 lbs and includes two suspension units. It’s backed by a 5-year limited warranty plus a 10-year warranty on the rubber bushings and springs, showing the confidence behind its durable design.

Specs

Application

  • Application: single-axle trailers with 3" diameter axle

Weight and Capacity

  • Weight capacity: 3,500 lbs

Quantity

  • Quantity: 2 suspension units

Warranty

  • General warranty: 5-Year limited warranty
  • Rubber bushings and rubber springs warranty: 10-Year warranty

SR3500S06 Timbren Silent Ride Trailer Suspension - 3" Single Axle - 3.5K





Video of Timbren Silent Ride Suspension for Single Axle Trailers w/ 3" Round Axles - 3,500 lbs
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Timbren Silent Ride Suspension Review

Today we're going to be taking a look at the Timbren line of silent ride suspension systems. Now, these systems have been designed to work for trailers with capacities anywhere from 2000 pounds all the way up to 14,000.Now, the silent ride system from Timbren is really one of the best upgrades you can make to a trailer suspension. This is going to give you excellent handling out of your trailer. You're not going to have so much of the side-to-side. You're also going to feel it less as you haul it.As our suspension system works here up and down, whether you're got your trailer loaded to capacity or empty, you will hear any feel a noticeable difference in the ride quality on your trailer. Now, I really appreciate that, because we haul a lot of trailers around here, and it's just aggravating, always hearing that noise, and always hearing that rattle behind you.

This has almost completely eliminated it on this trailer.This is also going to be very important when it comes to car haulers. You've got cars in here, sometimes race cars, expensive cars. You don't want them being beat up, your tools that are in there. You don't want them shaking around a whole lot. This is also going to work out really well for our camper trailers.

We've got dishes, we've got stuff in there that's important. We've got our tools stored in there. We just don't want them getting beat up.Installing a suspension system like this is really going to smooth all of that out for you.Now, the setup we have here today is the single axle configuration. You can see, we've got or 2x2 cross tube here, our axle here. This is also going to be available in a tandem axle configuration.

This body here becomes a little bit longer, we're going to have one of these off the back, we're going to have one of them off the front. Basically, you're going to have the same cross tube, but it's going to be 2x4, and it sits between them. Right up flush against here and the other side. All in all, it's going to give us a really good solution.Basically, the way this system works, we're going to mount the upper bracket to our trailer. We've got our lower arm here, that's free floating.

We've got an Aeon rubber spring here, and also here. This one is constantly trying to expand out slightly, and it's applying upward pressure on our arm. This one's applying downward pressure on our arm. As we hit a bump, of course, this is going to go up, as this goes up, this is going to expand. This one wants to pull it back, wants it get it back to its normal configuration. This one pushing out wants to get it to its normal configuration.If we think about a regular leaf spring style suspension, it's just sitting there in the middle. It's just going to wiggle when we hit bumps and stuff like that. Where, this is fighting to remain nice and steady and calm, over all those different bumps.Now, let's take a look at our conventional leaf spring suspension, versus our Timbren suspension. As you can see, there's a lot less movement, the trailer doesn't bounce up nearly as much, so it's generating a lot less noise. Overall, it's going to offer a much smoother and more controlled ride.Now, let's take a look at just the silent ride system, as we go through our test course. You can see as we're hitting the different bumps, you're not seeing as much movement as what we're used to with a conventional suspension system. It recovers very quickly. Now as we're just doing some maneuvering around our parking lot, you can see there's no trailer roll side to side. With them working independently, it helps kept everything level.These are also going to offer a variable spring rate. If we load our trailer with a light load, these are going to be compressed slightly, and that's all the effort they're going to have to put out, so it's not going to stiffen up our ride tremendously. As our load gets heavier and heavier, these compress more and more, they're going to get stiffer and stiffer, so they're almost going to adjust for the load that you put on, to maximize your ride quality.Now, the brackets we have here, of course, these are going to be heavy duty steel construction. They've got the black finish on it, help resist any kind of corrosion or issues like that for a long time to come.Now, on your tandem setup, there's a huge advantage in how the Timbren system equalizes the weight equally across your axles. With this single setup, we're going to have our upper bracket, we're going to have our base arm. With the tandem setup, we're still going to have our upper bracket, we're still going to have our base arm, but there's a walking leg that goes in between those. It's going to have a single pivot point right here in the middle, so as the tire gets pushed up in the back, it forces that front tire down. As the tire in the front gets pushed up, it forces that rear tire town. It maintains equal load across both axles at all times. That's something we don't see in leaf spring suspensions, even with equalizers installed. They just don't transfer that properly.Now, one thing to keep in mind when installing this system is that we need to reuse your existing axle. Where it meets the silent ride here, they provide us with this axle seat, so essentially, you're going to remove your old axle, you're going to grind those spring seats off of it to get it nice and flat. Get everything pre-assembled, place it up here, and you'll lay that weld across the back.Now, once we've decided where we're going to be positioning the silent ride, I've marked my holes in center punch. You can see here. You can leave the silent ride clamped into position, as if when you we're setting it up, and use those holes as the guide, if you want to do it that way, that's going to be completely up to you. What we need to wind up with a 5/8th inch diameter hole, we're going to use a step bit. We're going to 3/16ths, go up to a 3/8th, just slowly work up to that 5/8th. Generally, that's the easiest way to drill through this steel.We're going to get both our holes drilled out on this side, and do the same thing on the other side. Now that we got our holes drilled, we're going to take our hardware, get it put in place, we're using 5/8th diameter bolts, you want to use at least grade five, these happen to be grade eight. On to backside, we're going to put a flat washer on. Put a lock washer on. Also, our nut. Now we can snug out hardware down, ours takes a 15/16th, as long as yours is standard 5/8th, it should be the same. All right, now we'll torque those down to the specifications, which are listed in the instructions.Now, we've got our axle up in position. We've got our perches, our spring perches here on the bottom. Now, we had our welder take care of this, we had it all mocked up. We had him pre-weld this, although in your application, you're just going to have to out a bead across this side, and right up here. In the instructions, they tell you just to weld this up after you've got everything bolted up, so you might want to do it that way. It's going to be up to you.We just want to make sure we get our axle centered. You measure from your brake flange here, out to here, or to the center of your trailer, whatever you want to do. You want to make sure that's equal on both sides. Now, we've brought our U bolts down and around. You can see here, each one of those gets a washer, and a nut, and we're going to use a crisscross pattern, get those snugged down, and then we're going to torque them per the instructions.Now, here we've installed our crossmember. This needs to be a 2x2 inch squared piece of tubing. You can see it's 3/16th of an inch thickness. We want it 2x2, 3/16th inch wall. We've got our holes, we got one here, one here that we need to drill. Now, those are going to go in, all the way through, and then they need to come out that upper bracket. I'm going to mark my bottom here. Just using a center punch.Now, for our upper hole location here, it's going to be really tough to get anything in there to mark it. I'm just going to use a right angle pick. I'm going to go all the way around that elongated hole. Then we can just mark the center of that.All right, now we're ready to drill them out. These need to go to a half inch in diameter. We're going to use this step bit process, just like we did on our trailer. Gradually enlarging it.Then once we have the four drilled out here on this side, we're going to flip it over, and use our marks to drill our holes on this side.Now we've got our crossmember put back in place, we're just lining up those holes. We want to take our bolt. We want to pass it up through. On the top, we're going to be using a nylon locknut. Now, depending on your application, this might be a pretty tight fit in here. You could also use a flat washer, a lock washer and a nut, if you have space. It seems like for us, this nylon locknut's really the best solution. We're going to put one in each hole, so two on this side. We've already got the two on the other side. Now we'll get them tightened down.Most of your half inch bolts, you're going to need a 19mm or 3/4, unless you're using something odd sized. Now, we'll want to get these torqued down. Now, once we've got all that torqued down to specifications, we've gone through everything, make sure everything's nice and secure, it's time to just basically rebuild our axles.That's going to complete our look at the Timbren line of silent ride suspension systems.

Ratings & Reviews

4.7

28 reviews
5 Stars
(25)
4 Stars
(0)
3 Stars
(1)
2 Stars
(1)
1 Star
(1)
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by:
I have had both leaf suspensions and torsion suspensions on pull behind campers. I decided to try these when I had to replace my torsion axles. The Timbrens are without a doubt the best suspension I have ever used. The trailer rides much smoother as it creates an independent suspension for each wheel. The rubber pad absorption design adds to the smoothness. The camper is also much more stable when towing and I don,t end up with stuff all over the floor of the camper from a rough ride. I am extremely satisfied and highly recommend this suspension system.
Carl R. profile picture

Carl R.

3/5/2021

In one word: great

by:
by:
The description isn't very clear, I thought 2000lbs suspension would mean 2000lbs per side, not 2000lbs combined capacity. Okay I get it, it was ignorance on my part, but I wish the description would've been a little clearer. The company wasn't interested in helping me out, other than happily selling me a new one at the normal price. There again, hey it's not their problem I guess. Even so at 2000Lbs, the suspension sags like crazy and doesn't ride any better than the traditional, much cheaper leaf spring system.
by:
Very nice product
by:
I’m really torn about these. On the one hand, they are silent and tow really really well. Until you hit a bump. So far, our microwave broke, the hood on our range came loose, and the Aeon (sp?) dampeners should ideally be taller to prevent the axle from hitting the frame when a pothole is hit. I have contacted the manufacturer and they have been super supportive and sent me 5k springs, but it didn’t fix the bottoming out issue. I am at a loss as to what to do next. So am I happy? Not really. Did it solve my issue? Kinda. What would make it perfect is a taller spring or some way to adjust the articulating arms so they are so closed (like scissors) and give the axle a reason to hit the frame. That jarring caused the microwave to break and the hood to come loose. We didn’t have these issues with the leaf springs.
by:
It is quiet, but… Since they are both mounted to a solid axle it doesn’t provide any sway from side to side. It is very bouncy on uneven side to side bumps and doesn’t track well. I’m sure this works well in a spindle configuration when spindles/wheels are independent. I ordered new leaf springs to remove them. Quite disappointed.
Kate F. profile picture
Etrailer Expert

Kate F.

6/5/2026

Thanks for your review James. We're sorry to hear the Timbren Silent Ride suspension didn't perform as expected on your trailer. One thing worth checking is whether the system is operating within its intended weight range, as trailers that are significantly underloaded can sometimes experience a firmer, bouncier ride. It's also important to verify that the suspension components are installed square and that the axle alignment is correct, since alignment can affect tracking performance.

James profile picture

James

6/5/2026

@KateF thank you Kate. Yes we checked mounting, torque and the weight is well under the capacity at 1550 lbs GVW loaded. It seems the problem noted by mechanics is the design. The solid axle mounted directly to rigid side swing arms does not allow for any flex, or sway, side to side. On even bumps it’s great, like speed bumps. But a bump on one side unsettles the trailer and aggressively re-arranges cargo. I wish I had read this review before I bought this product. I like the idea of the product, and may still consider the axle less design moving forward, but for now, for the sake of my cargo and safety, I’m going back to leaf springs.
by:
My worries about my trailer have been removed. I am very happy with the suspension system and would recommend these suspension systems.
Daniel profile picture

Daniel

9/3/2023

Fantastic!

by:
We used this on an aluminum utility trailer that originally had a leaf spring setup. Easy to install, we just flipped the trailer upside down...
Turned a so-so trailer into an awesome one. Thanks!
by:
Probably the best upgrade I will ever do to our Roof Top Tent trailer. Rides absolutely amazing. I’ll never run leaf springs again.
Nicholas profile picture

Nicholas

10/4/2023

Man! These have been so awesome on our trailer over the past year. We’ve been on many trips without issue. They ride great and still feel as solid as day 1. I’ll change from leaf springs to these on my next trailer for sure!

by:
Ok, probably overkill and certainly makes for a premium utility trailer. But compared to other trailers, there’s zero rattling and bouncing around. Install went better than expected too. Did have to weld quick to keep the heat down since the rubbers are right on the other side!
by:
I like the product. But the instructions aren’t the best one part of the instructions tell you to bolt the cross member on then when you look at the picture they tell you to weld it. If you look at your videos they showed a bracket on the front of the hanger that you can bolt it on. To weld it on you have to be careful not to burn the rubber part of the suspension that is right where they want you to weld it.
by:
Had some problems with missing parts, but customer service was on the ball. got rest of parts 4 days later.. So to say customer was very helpful is an understatement. Installment was easy. Instructions were helpful. etrailer has my vote....
by:
Installation went well. Not yet used for a heavy load. Switched from leaf spring suspension and empty doesn't seem to bounce any less than prior to the switch. Moderate load does show some improvement.
by:
A more stable ride Wolf-Pup Forrester RV trailer.
by:
looks great solves spring hanging easier to install personal flat bed trailer
by:
Perfect replacement for my car carrier axles
by:
We like the product
by:
Just did a test fit but like everything about the product! Construction quality ease of assembly all first rate!
by:
Worth the money! Super nice ride loaded and empty.
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See what our Experts say about this Timbren Trailer Suspension Parts

  • Where Do I Find A 3,500 lb Axle With A 3" diameter
    Hello Andy, good question. The standard axle tube diameter for a 3,500 lb axle is 2-3/8". All of the 3,500 lb axles made today will have this same diameter. The 3" diameter 3,500 lb axles are an older design that is basically no longer made, so the # TSR3500S06 kit would really only be applicable for older trailers. For the standard 2-3/8" 3,500 lb axles you can use part # TSR3500S04. If you need an axle with a 3" tube diameter you would have to go with an axle rated between 5,200 and...
    view full answer...
  • How To Chose A Timbren Silent Ride Suspension System
    The difference between a 3,500 and 5,000 lb Timbren Silent Ride is the structural strength of the springs. Also there is a design difference in the hardware depending on what diameter and shape axle you have. Ideally, you want to match the Timbren Silent Ride up with your axle capacity. If your axle is a 5000 lb axle, you want to go with a 5,000 lb system otherwise they will not properly support the trailer and it will sag. However, if you only have 2,000 lbs on the trailer and you have...
    view full answer...
  • Suspension Kit Recommendation for Overland Custom Trailer with 3.5K Dexter Axle
    For an off-road application I highly recommend a Timbren Silent Ride Suspension system which is available for a 2-3/8" Round 3.5K Axle # TSR3500S04 or a 3" Round 3.5K Axle # TSR3500S06. These give you a little more control and perform better than your traditional axle leaf spring setup as you can see in the linked video. If you'd like to stick with the traditional leaf spring setup then I recommend the following parts: Single-Axle Trailer Hanger Kit - # APS4 4-Leaf Double-Eye Spring -...
    view full answer...
  • Does the Timbren Silent Ride Provide Greater Suspension Travel Than Standard Leaf Springs
    I may have a solution for you, but I'm not sure the Timbren Silent Ride Suspension # TSR3500S06 is exactly what you're looking for. The Timbren Silent Ride does not necessarily allow for more travel than your current leaf spring suspension system, but instead is designed to provide a softer ride that will enhance stability. Leaf spring suspension systems don't typically allow for a lot of articulation in the way that a vehicle's coil and shock absorber system would. If you're concerned...
    view full answer...
  • Will Timbren Silent Ride Change Ride Height Compared to Torsion Axle
    From the mounting surface on the frame of your trailer down to the axle center on the Timbren Silent Ride part # TSR3500S06 measures 5-1/4 inches. You would need to compare that to your current setup to determine if that would change the ground clearance.
    view full answer...

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