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Timbren Active Off-Road Bumpstops - Rear Suspension - 3,600 lbs

Timbren Active Off-Road Bumpstops - Rear Suspension - 3,600 lbs

Our Price: $252.45
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Great Prices for the best vehicle suspension from Timbren. Timbren Active Off-Road Bumpstops - Rear Suspension - 3,600 lbs part number TABSOSR can be ordered online at or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TABSOSR

  • Bump Stops
  • Rear Axle Suspension Enhancement
  • Light Duty
  • Timbren

Timbren's Active Off-Road Bumpstops provide off-road enthusiasts with greater control over their vehicle's suspension travel. Using progressive-rate springs means that instead of a hard stop at the end of axle travel, the axle energy will be absorbed when bottoming out, producing smooth, predictable, and quiet axle engagement and disengagement. The progressive rubber springs absorb the harsh jolt at the end of axle travel, giving you a gentle ride the whole time.

Unlike your factory bumpstops, Timbren's bumpstops are constructed of a superior natural rubber compound, ensuring the bumpstops will continue to operate even after a lifetime of off-road abuse. And the steel brackets and disks are lazer cut before they are painted with a durable, long-lasting powder coat finish to ensure protection and long life.


  • Designed to maximize axle travel
  • Smooth axle engagement and disengagement
  • Enhances rear suspension performance
  • Progressive spring rate
  • Absorbs energy and cushions road shocks
  • Constructed of a natural rubber compound
  • Stronger than OEM bumpstops
  • Easy installation - hardware included
  • Capacity: 3,600 lbs
  • Lifetime warranty
  • Satisfaction guarantee

ABSOSR Timbren Active Off-Road Bump Stops - Rear Suspension - 3,600 lbs

ABSOSR Timbren Active Off-Road Bumpstops - Rear Suspension - 3,600 lbs

Installation Details TABSOSR Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Active Off-Road Bumpstops - Rear Suspension - 3,600 lbs - TABSOSR

Average Customer Rating:  4.7 out of 5 stars   (106 Customer Reviews)


The factory bump stops were harsh. These engage sooner and while firm they do not crash like the OEM.
Easy install.

2009 Toyota Tacoma

These do what they're built to do. I overland a lot so when the truck gets weighed down with gear she tends to squat a little and when I go through bumpy areas the factory stops would slam the frame. No any more with these Active Bump Stops. A much smoother ride and less body roll when cornering.

2010 Toyota Tundra

Ordered for my 2010 Toyota Tundra. Parts came quickly and had them installed in about 20 minutes. Just needed a good vehicle jack and impact wrench and was very easy. These have greatly reduced the sag when pulling my camper and very satisfied.

Ford Escape

They seem to perform just fine, absorbing bumps and impacts etc. However they collect water like little buckets and the bolts are clearly corroding on the inside of the bumpstops since they have no drainage. Adding a way for water to escape faster than evaporation would be a good improvement to the product!


Work great, save my air bags from getting pinched if I let them get deflated.

2012 Toyota Tundra

I had these on my Tacoma and liked the way they worked so much that I got a set for my new to me Tundra. You don't notice anything until you put a load on the truck. Then you feel more stable under load and don't have to worry as much about the leaf springs. The install was done in 15 minutes



I pull a 20 ft car hauler with the Tundra and recently hauled a car to Arizona then hauled another back. The frame just touches the top of the Timbren when loaded. After 3,000 miles of driving I am even more convinced that this is a great product. The truck never squats from trailer load and the Timbren also keeps the ride smooth straight and steady when pulling a load. When unloaded there is about a one inch gap between the frame and the Timbren so it drives like stock when lightly loaded or unloaded.

2023 Toyota Tacoma

I have had Timbrens on several trucks! I always thought they worked great! I plan on putting these on a new Tacoma, which I will not yet until the end of September so I hope they fit! They are a very good product otherwise I would not use them!


Installation was a breeze! Followed the instructions and lifted the truck up using a jack under my hitch, loosened the u-bolts, removed the factory bump stops and installed the timbrens! Took 5 minutes for each side, and 5 minutes to setup and take down setup. 15 minutes max. Very easy to do. I believe I am going to need a 1” spacer as I have 1.5” Icon add-a-leaf packs in order to get them to engage while towing.

2018 Toyota Tacoma

It only took less then 30 minutes to install, What a big improvement!! Installed on a 2022 Toyota Tacoma Off Road, towing a 2018 Coachman Ultra Lite, 5900 lbs.


Very effective upgrade and install wasn’t to bad either. Highly recommended! 2003 Toyota Tundra.



No complaints, great product!

Etrailer Expert

Mike L.


@Stephen We're glad to hear that the # TABSOSR Timbren replacement bump stops work well for you!


Very easy to install.

2014 Toyota Tacoma

I have a medium-duty truck and recently purchased a camp trailer. Well, when I pulled the trailer home for the first time the back of the truck was weighed down. I installed the new Timbren Active Off-Road Bumpstops and they improved the load capacity immensely. When I get the cash saved up I plan on purchasing the Timbren Active Off-Road Bumpstops for the front. Worth every penny.





Correct hardware for install was not included, I bolted them right to the frame and the axle come up to them. They are great I haul heavy loads long distances and they exceed my expectations. Way better than the air bags that my tire wore holes in while off roading. These rubber bump stops are bullet proof and worry free

Toyota Tacoma

timbren were a perfect fit for my tacoma and was able to install the parts on myself they will make a big difference for leveling out the vehicle when pulling my travel trailer

2016 Toyota Tacoma

Would not have been able to tow 16 foot airstream without them. My Toyota Tacoma needs all the help it can get for towing any weight.


Easy Install, about an hour each side.
nothing to standard suspension until there is a load on them. When loaded you don’t have the banging with regular stops and steering and cornering are the same as unloaded. The biggest load I’ve carried is 3,400 lbs.
Make sure you check load rating on your tires before you add that much weight.


work fine for what I need . Im using in couple with air lift bags. But I fell are to tall and affect the rear suspention ride and travel .They do stop any bottoming which is what they are meant to do.


I've had them on every truck I've owned, and I like them.

Nissan Frontier

These were a breeze to install with rear of my Frontier Pro4X on ramps. they fit perfectly, and are a drastic improvement over the rock hard rubber factory bump stops.



The Timbren OffRoad bumpstops have been working great, ride quality is much improved when suspension bottoms out and these are great bumpstops. Intstallation was a breeze.


The Timbren bumpstops improved not only the loaded ride of the frontier, they also, imho, helped with the unloaded ride. This was on a 2018 frontier, the factory leaf spring pack is not made for hauling much, or a trailer with any tongue weight over 200#'s.
I had an issue with missing\wrong parts, I called e-trailer, they where wonderful to work with on fixing this issue.


Works great and is much cheaper and easier to install than air bags or a weight distribution hitch. Highly recommend.


I've got a 2019 Tacoma TRD Offroad Double Cab with otherwise stock suspension: Bilsteins and 4 leaf spring in rears. GVWR is 5600lbs and I run it at about 5200lbs with all my racks and add-ons. I've only off roaded a couple times (with even more load) and didn't have any issues bottoming out my stoppers, but I often jarringly hit my stoppers in the streets of San Francisco, most notably heading east on Fulton St at 43rd Ave at a bus stop transition (35 mph speed limit). I was hoping this quick fix would alleviate the problem without stiffening my normal ride. I find the truck, when unladen, is bouncy at highway speeds on concrete roadways (gets a sea sick inducing bounce when the suspension becomes harmonic with the cracks and surface waves), so I didn't want to tighten up the suspension at all.

I got the Timbren Active Offroad bump stops yesterday and it took me just over 30 mins to install with no hassle. There is only a hair gap between the top of the bump pad and the frame when parked. I took it for a test drive through the neighborhood and it felt like it did stiffen the ride a little bit, but had more control over bumps and dips, and less side sway. Then this morning I took it to the fateful Fulton test spot. Boy did it hit hard today. The change in my trays didn't go flying as usual, but I did bottom out the new bump stops with a thud. So their performance was not as great as I had hoped, but it did make it a little better. My expectation may not be reasonable, but I thought its road performance with be better than off road (I guess you go slower off road though). I'll have to see over time and perhaps consider more suspension upgrades. One thing I am curious about is how much bed sag I will have if I'm hauling stone. I've ridden on the stock bump stops with trips from the yard, so although these are not designed for towing or hauling, I'm hoping they will help the sag some. Maybe I can update this in a few weeks.

2020 Toyota Tundra

Just received them tonight but they looks like they will do the job - thanks for the help


I threw these on a Toyota Tacoma TRD in hopes of eliminating bottoming out on the suspension and increasing pay load a bit. I use the truck mainly for work around my farm and as my off road machine. I am more than impressed on what the Timbren bump stops delivered. The ride is softer in rough terrain and the truck barely squats when loaded full of feed or piled high with fuel, gear and animals during hunting season.

Toyota Tundra

Good investment, put 1,600 lbs. of gravel in my half ton tundra, no worries about breaking a spring.

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Recommended Suspension Enhancment for a 2024 GMC Canyon
    I recommend checking out the Timbren Active Off-Road Bumpstops # TABSOSR. These will replace your factory bumpstops, are designed to maximize axle travel, and has a capacity of 3,600 lbs. These bumpstops are made of a superior natural rubber compound, making sure these will continue to operate even after a lifetime of off-road abuse.
    view full answer...
  • Assembled Height of Timbren Active Off-Road Bumpstops # TABSOSR
    The Timbren Active Off-Road Bumpstops # TABSOSR referenced in your question feature an assembled height of 4-5/8 inches. I have attached a short video review on this kit along with the written installation instructions that you can check out as well.
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  • Rear Suspension Enhancement Recommendation for 2018 Toyota Tundra
    For your 2018 Toyota Tundra the suspension enhancement I recommend is the Timbren kit part # TABSOSR because this kit installs easily, gives you the suspension support you need to greatly reduce the sag, and because it doesn't require monitoring air pressure or running air lines like the air bag kits do so it's very low maintenance. I attached a link to an install video for this kit for you to check out as well.
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  • What are the Dimensions of the Timbren Active Off-Road Bumpstops for Toyota Tacoma?
    The Timbren Active Off-Road Bumpstops - Rear Suspension - 3,600 lbs # TABSTRFK have bump stops and mounts that are 5-1/2 inches tall overall and u-bolts that are 8-1/4 inches long and 3-3/4 inches on center. I've attached a photo to assist. These jounce springs will mitigate sag when towing and they will work great for your off-road towing.
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  • Rear Suspension Enhancement for 2021 Chevy Colorado 4x4
    For your 2021 Chevy Colorado 4x4 we have the Timbren rear suspension kit part # TABSOSR as a confirmed fit that would do an excellent job reducing the sag you are experiencing. SumoSprings does not have a kit for your truck at this time but the Timbrens are essentially the same design as it's a jounce type bumper designed to replace the bump stop.
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  • Correct Timbren Active Off-Road Bumpstops for a 2020 Nissan Frontier
    It sounds like you're looking for the Timbren Active Off-Road Bumpstops part # TABSOSR which are a fit for a 2020 Nissan Frontier. These are great for towing or hauling and will work to reduce sag/squat without minimizing axle travel.
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  • Suspension Enhancement Recommendation for 2008 Toyota Tundra
    We have suspension enhancement that fits your 2008 Toyota Tundra that will help you tow within the capacities of your truck, but nothing we offer will give you higher capacities than what you already have. Our suspension enhancement kits like the Timbren part # TABSOSR which fit your Tundra will help reduce sag when towing a heavy trailer but you have to make sure the weight of the trailer is less than the towing capacity for the truck. It's not just the suspension and engine power that...
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  • Installation of Timbren Suspension Enhancement Springs on 2012 Toyota Tundra 4x4
    The Timbren Springs for your 2012 Toyota Tundra Crew Max 4x4 like # TABSOSR all install to the spring stack at the rear and not to the frame. The front mounted springs # TABSTOF do however mount to the frame. All of the rear suspension enhancement options from all our manufacturers mount to the leaf spring stack on your specific truck.
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  • Rear Helper Springs/Suspension Enhancement for a 2018 Chevy Colorado ZR2 Diesel
    For your 2018 Chevy Colorado ZR2 Diesel I recommend RoadActive Suspension # RAS4617. This system will provide extra support when towing and/or carrying loads in the truck bed as well as help with overall stability all without affecting the unloaded ride quality of the truck. The kit comes assembled and ready to install so you will have more time for your adventures!
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  • Timbren Suspension Enhancement System for 2018 Toyota Tundra 4WD
    The Timbren Rear Suspension Enhancement System # TTORTUN4 is a great SES that fits your 2018 Toyota Tundra. The Timbren line of SES is really popular and there are several models available. The # TTORTUN4 features heavy duty rubber springs with a 6,000 lb weight capacity. The Timbren Active Off-Road Bumpstops # TABSOSR features a lighter duty rubber spring with a 3,600 lb weight capacity. Both products fit your vehicle and install in the same way, but the # TTORTUN4 is better if you expect...
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  • Timbren Rear Suspension Enhancement For a 2005 Toyota Tacoma Pre-Runner
    We do have the Timbren Rear Suspension Enhancement System # TTORTUN4 for your 2005 Toyota Tacoma Pre-Runner 2wd. This kit has a rated capacity of 6,000lbs to reduce sag and improve stability. We also have the Timbren Active Off-Road Bumpstops # TABSOSR rated for a capacity of 3,600lbs. These will provide you with more suspension travel than the kit above. So while you will see more sag out of this kit when you load your Tacoma, you will have a smoother ride when unloaded.
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  • Best Suspension Enhancement for 2013 Nissan Frontier with Camper in Truck Bed
    A set of SumoSprings like part # SSR-610-54 for your 2013 Nissan Frontier are going to be your best option for adding more support to the truck's rear suspension when carrying the camper you mentioned. This will help reduce suspension sag and will also help with side to side sway without adding too much harshness to the ride quality.
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  • Suspension Enhancement Recommendation for 2018 Toyota Tundra that Improves Ride Quality
    Timbren's actually have the reputation as providing the harshest ride quality of all of the suspension enhancement kits so that would not be my first choice. Instead I would recommend the RoadActive Suspension kit part # RAS34FR which will give you additional support, is adjustable, and also actually improves the ride quality and stability unlike other options that will make it harsher.
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  • Recommended Timbren Suspension Enhancement for a 2022 Nissan Frontier
    Unfortunately Timbren does not make their Timbren Active Off-Road Bumpstops # TABSOSR kit without the axle bracket, so if you don't need it you'll just ignore it and install everything else. To figure out if you need a spacer kit #T68MR you're going to need to measure between the frame of your trunk when empty to the rear leaf spring. If you measure anything between 6" to 7 1/2", then you're going to need a spacer.
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  • Is the Weight Capacity on # ABSTORSEQ Enough for 2016 Toyota Tundra Towing a 7,500 lbs Trailer?
    The 6,000 lbs weight capacity listed for the Timbren Active Off-Road Bumpstops # TABSTORSEQ is the vertical load limit of the bumpstops. When towing a trailer, the trailer weight is distributed between the trailer axle and the tow vehicle. The weight that is transferred to the tow vehicle is referred to as "tongue weight" and is usually about 10% - 15% of the gross trailer weight. You will never actually have the full 7,500 lbs of your trailer weight being transferred to your vehicle and...
    view full answer...
  • Suspension Enhancement Recommendation for 2016 Toyota Tundra TRD with 5th Wheel Rails
    I have a suspension enhancement kit that fits your 2016 Toyota Tundra TRD if you were to install the Reese fifth wheel rail kit part # RP50026-58 but none of the air bag kits are a fit. Instead you'd need to go with the Timbren kit part # TABSOSR which would not interfere and would work well for more suspension support. It gives you suspension support when you need it but when unloaded does not affect the ride quality. Also it does not require maintaining air pressure like the air bag kits do.
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  • Rear Axle Suspension Helper Springs for 2019 Chevy Colorado Diesel
    For the 2019 Chevy Colorado with diesel engine there are not any compatible air bag kits (as of April 2019) but we do have other suspension helper kits that can support the rear suspension when it is under the load of your 5000-lb trailer. Based on your trailer weight I recommend the Super Springs kit # SSR-212-40. Their 1000-lb rating is just right for your trailer tongue weight and they will give you the support you need to prevent sag without causing the ride to become harsh. Their...
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  • Will Timbren Kit for 2013 Toyota Tacoma Fill with Water
    Due to the design of the Timbren kit part # TABSOSR it would potentially fill with water if they were submerged. This eventually could lead to rusting out the base and even one guy remarked that when filled with water there is a "fart sound" when hitting bumps. The second part could be a pro or a con depending on how refined your sense of humor is. So instead of going that route I would recommend the SumoSprings Solo part # SSR-610-40 which does not have that void and is known for providing...
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  • SumoSprings or Timbren Springs For a 2016 Toyota Tundra For Hauling Occasional Loads
    I recommend using the SumoSprings Solo Custom Helper Springs # SSR-610-47 on our 2016 Toyota Tundra. As you will only be hauling the additional weight a few times a year for a short distance this will provide you with the best ride quality when you are using your truck as a daily driver. The Timbren Springs # TABSOSR will create a stiffer ride both while hauling additional loads and while daily driving. I only recommend these types of springs for vehicles who will see additional weight...
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  • Will Timbren Helper Springs Cushion Ride of 2018 Chevy Colorado when Towing with Weight Distribution
    It is possible that the weight distribution system you are using is rated too high for the total tongue weight of the trailer. Total tongue weight is the tongue weight of the trailer when loaded and ready to tow plus the weight of anything loaded behind the rear axle in your 2018 Chevy Colorado. So for example if the trailer tongue weight is 500 pounds and you have 40 pounds of stuff behind the rear axle the total tongue weight would be 540 pounds. The 750 pound Blue Ox systems are rated...
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  • Recommended Bump Stop Suspension Enhancement for a 2017 Chevrolet Colorado
    Really the only difference between the Timbren part # TABSGMFCC and part # TABSOSR for your 2017 Chevrolet Colorado is that the former is rated for up to 1,000 lbs while the latter is rated for up to 3,600 lbs. Out of these options I would go with the set that has a higher rating. Since you do off-road driving you will want to use the off-road bumpstops referenced above. If you are looking for ride comfort though I recommend going with the SuperSprings Solo Custom Helper Springs # SSR-212-40....
    view full answer...
  • Comparing Rear Suspension Enhancement Systems For A 2018 Nissan Frontier
    Thanks for the helpful information! For your 2018 Nissan Frontier there are two really nice rear suspension-enhancement systems that I recommend looking into. They are the Firestone Ride Rite Air Bags - Rear Axle # F2558 and the Timbren Active Off-Road Bumpstops - Rear Suspension # TABSOSR. Both setups will reduce rear-end sag and reduce body roll on sharp turns. The Timbren setup is a jounce-style spring that will replace your factory bump stops and will help your factory suspension with...
    view full answer...
  • Height Of Timbren Springs and Vertical Wheel Travel Loss In 2019 Toyota Tacoma
    When installing any Timbren system on the 2019 Toyota Tacoma you should have about 1/2" to 1-1/2" between the frame and the spring after installation. You won't necessarily be losing wheel travel when you use a Timbren Rear Suspension Enhancement System on the Tacoma. I recommend either the # TTORTUN4 system if you have 4 leaf springs in the rear suspension or # TTORTUN4L if you have 3 leaf springs in the rear suspension. When you switch out the factory bump stops for the Timbren springs...
    view full answer...
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  • What Length Bolt To Install 1" Spacer On Timbren Active Off-Road Bumpstop TABSOSR For 2014 Tundra?
    To add a 1" spacer # A25723-90AH00 to the Timbren Active Off-Road Bumpstops # TABSOSR you were looking at for your 2014 Toyota Tundra you will need to purchase two grade 5 or 8 3/8" x 2-1/2" F/T UNC bolts from your local hardware store. I included videos for each of the products mentioned for you to take a look at.
    view full answer...

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Info for this part was:

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Employee Dustin K
Video Edited:
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Employee Cole B
Installed by:
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