bing tracking image
  1. Vehicle Suspension
  2. Timbren
  3. Rear Axle Suspension Enhancement
  4. Bump Stops
  5. Heavy Duty
Timbren Active Off-Road Bumpstops w/ U-Bolt Flip Kit - Rear Suspension - 4,800 lbs
Special Savings on Select Timbren Items. See Cart for Savings.

Timbren Active Off-Road Bumpstops w/ U-Bolt Flip Kit - Rear Suspension - 4,800 lbs

Item # T66GR
Retail:$316.90
Our Price: $269.36
You Save: $47.54
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Add to cart
In Stock
Instant Rebate
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Videos

Need help with installation?
Locate installers near me
Replace your rear factory bumpstops and enjoy greater control over your vehicle suspension when travelling off-road. U-bolt flip kit allows for additional ground clearance. Great Prices for the best vehicle suspension from Timbren. Timbren Active Off-Road Bumpstops w/ U-Bolt Flip Kit - Rear Suspension - 4,800 lbs part number T66GR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (115)
  • Q & A (0)
  • Videos (1)
  • Photos

Timbren Vehicle Suspension - T66GR

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

Replace your rear factory bumpstops and enjoy greater control over your vehicle suspension when travelling off-road. U-bolt flip kit allows for additional ground clearance.


Features:

  • 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
  • Satisfaction guarantee


Specs:

  • Capacity: 4,800 lbs
  • Overall kit height: 5-1/4"
  • Lifetime warranty


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 laser cut before they are painted with a durable, long-lasting powder coat finish to ensure protection and long life.




ABSGMFK Timbren Active Off-Road Bumpstops w/ U-Bolt Flip Kit - Rear Suspension - 4,800 lbs

Installation Details T66GR Installation instructions

This Product Fits The Following Vehicles




Video of Timbren Active Off-Road Bumpstops w/ U-Bolt Flip Kit - Rear Suspension - 4,800 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Timbren Manufacturer Spotlight - Suspension Enhancement

Hey guys, it's Jake here with etrailer. Today we've got John with us from Timbren. He's gonna tell us a little bit more about what separates Timbren from the competitors. I appreciate it, I'm glad to be here. Timbren is a suspension specialist. We're based in Whitby, Ontario, so we are a true manufacturer in Canada and we offer a wide range of suspension products from light duty, from commercial all the way up to Overlander, Sprinter applications and trailers.

Now we've talked about a few of the options you guys have and we have plenty of options on our website. Right. We've got the SES kits. We've got the axle-less suspension. Right.

We've got your new coil inserts that just came out recently. But what would you say is your bread-and-butter at Timbren Yeah, no, our SES, suspension enhancement system, is definitely our bread-and-butter. Came out in 2011, won a SEMA New Product Award for best truck suspension. And really, the evolution you just mentioned here, you know, starting in 1968 all the way through now, 2024. But the SES kits are really the core of who we are.

And if you, if you would say at, in the level of stiffness on the market, what would you, would you put yourself in more in a heavy duty side for the SES kits or is it more of a lighter duty Yeah, great question. Lighter duty, we certainly can have a product for commercial and heavy duty, but in '82 when SES was introduced, it was purposely introduced for that, that light duty market. So we start with 1500 and again, go all the way up, but by far really popular with that 1500, 2500 crowd. That kinda leads me into my next question. So we talked about, your specialty is kind of in the lighter duty, but do you have an option for the heavier duty for your sprinter vans and maybe for your truck bed campers Yeah, absolutely.

We do have SES kits for truck beds, truck campers with a higher center of gravity. That creates a new kind of set of problems with the sway side to side. So we have severe duty kits for those. And it uses a single convoluted AON versus a double convoluted to tackle that problem of side to side. And the same thing with the sprinter van. It uses a rectangular shape Aon, but it's there to do the same deal that side to side sway because they're so top heavy, it'll eliminate that. Okay. And then we've had an instance here at etrailer that we had a van that was very, very heavy on the one side. Is there anything that you guys can do personally to help, I would say, I guess customize that kit for that particular user Yeah, by all means we would want that individual to contact us. We would ask a couple questions, see where that weight is distributed and we can actually produce an AON with either a stiffer hardness or durometer or a softer durometer and that will help level it out. So yes, we can take care of that for 'em. And I think that'll really, really help people to get their rigs dialed in because who knows what they're putting in the campers afterwards, after they buy 'em. They come from the manufacturer already heavy on that side and they're trying to load stuff on the other side to try to even it out. But knowing that there's a solution that you can customize for your rig no matter what the weight is on either side is really, really cool. Yeah, absolutely. We're happy to take care of 'em and again, there's no charge for that. Awesome. Now to kind of wrap things up, what sets Timbren apart from a lot of other manufacturers out there Well, I think there's a couple things. We're a family run company and our longevity, you can't deny, 1968 to 2024 and our warranty, we have a lifetime warranty regardless of how old it is. We will take care of it, replace it, limited lifetime warranty, and the hundred day money back guarantee. Very cool. And that's whether or not you're the first owner Right. And yeah, we're not asking for receipt, who'd you buy it from It'll be taken care of. Just give us a ring and we'll take care of it for you. Very cool. Well thank you again for meeting with us. Appreciate it. It was a pleasure to work with you. Thank you.


Customer Reviews

Timbren Active Off-Road Bumpstops w/ U-Bolt Flip Kit - Rear Suspension - 4,800 lbs - T66GR

Average Customer Rating:  4.7 out of 5 stars   (115 Customer Reviews)

Replace your rear factory bumpstops and enjoy greater control over your vehicle suspension when travelling off-road. U-bolt flip kit allows for additional ground clearance.

by:

Other than a quick test-drive, I haven't really tested these out yet. The product is much more heavy duty than the stock bumpstops on the 2023 Tundra and they appear well made. Installation was easy, took less than an hour. Make sure you seat the rear mounting bolt first; I didn't do that on the first one and then had some difficulty seating a socket on that bolt during installation due to tight product clearances. The hardest part for me was finding 2 17mm sockets and ratchets in my tools to assemble the product. I did not need to raise the truck to install.



by:

These definitely do the job in my xterra whether it’s hooking up a heavy trailer or just stopping the bottoming out these vehicles can experience. Easy install would recommend 100%



by:

Can't wait to pull my RV trailer again and see less squat in the backend of my Raptor!! These are going to make a difference.



by:

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.



by:

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



by:

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.



by:

While towing my boat (2021 Tracker Pro Guide V-175/Mercury 115 ProXS, ~3,200lbs) in my 2021 Toyota 4Runner SR5 Premium, I noticed a significant rear squat. Additionally, fellow motorists would flag me for “high beaming” when I was not. This squatting in the rear raised the front end and subsequent headlight alignment. After much research and review, I purchased the Timbren SES and installed it. With the vehicle hitch unloaded, the SES rides approximately 1.250” above the rear axel. With the boat loaded onto the hitch, the Timbren SES contacts the axel and holds the load firmly, maintaining a level vehicle. I was pleasantly surprised to see that the ride was not greatly effected. Matter of fact, the vehicle rides much better while towing than before installing the SES. With the 3rd row seating in use, and the vehicle full of passengers, the rear passengers complained of a very bumpy ride and I noticed a very rough feel with hard bumps from the rear. After installing the Timbren SES, even with the boat on the hitch and the vehicle fully loaded, my 4Runner remains level and the ride is substantially improved. If you have 3rd row seating and/or plan on towing ANYTHING with your 4Runner, you absolutely need the Timbren SES. Installation is a breeze. Easiest accessory you’ll ever upgrade.



by:

Very easy to install, haven't traveled with trailer yet but will be traveling in April.



by:

Easy install, Nissan Xterra. Love that it came with all the hardware because I had to knock all existing hardware out with a hammer and chisel. I used four additional washers I had so I could put one inside the frame and one on the bumpstop mount. Etrailer shipped fast and free, bumpstops arrived ahead of schedule. Highly recommend these mounts, night and day difference.



by:

They work well towing a heavey trailer.



by:

Well after used the Chat online with Carol I ordered. Paid for 2 day shipping. Got it in 2 days.

Total install time 1 hour.



by:

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



by:

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!



by:

My 2013 4runner was squatting in the rear when I coupled my 6X12 motorcycle trailer. I was very happy to have found the Timbren bump stop to simply bolt on and fix the problem. However.....during the installation I noticed I had to use ALL of the adjustment slot on the unit to TRY to center on the rear axle. I oriented the units as far towards the rear as the adjustment would allow.
When I coupled my trailer to the 4runner it correctly forced the Timbren bump stop to contact the axle and this is where the problem is.
The Timbren bump stop CAN NOT be adjusted far enough towards the rear to accomplish a centering on the axle. There is a 25% overhang of the bump stop on the axle front. When I communicated with Timbren about this they said" it's a good installation and it's ok". It is not ok.
Imagine that all of the force of a fully loaded truck will be negotiating curves, potholes, swoops and other hazards of the road at highway speeds. All of this stress is distributed on 75% of the product. It can't work as well as if it was 100% distribution. I felt the product was overpriced to begin with. After paying a premium price I expected a custom proper fit.
I can't recommend this product for Toyota 4runner owners.



by:

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



by:

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.



by:

Fit was well, but had some paint chipped off from transit.



by:

easy to install - might want to let installers know you don't need to remove rear tires or jack the vehicle up (safety first!) on the Tundra. Just remove the 3 oem 12mm bolts on each side and replace the itty-bitty oem bump stops with your nice Timbren's (17mm bolt head and nut).



by:

I Install this product on the front and back of my 1994 toyota land cruiser ,I realy like them , we explore the Baja peninsula in MEXICO the off road land is very ruff , this bumpstop realy work . the don't crash in to my diferencial any more



by:

I had no problems with the installation. It only took about 15 minutes to put these on! There is adjustment space on the brackets to let u be able to center product over rear axles. The pictures below show the product installed while my 4 runner is both raised up for installation and after lowering it down. When lowered down and jack removed I have about an inch clearance.



by:

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!



by:

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



by:

These bump stops are amazing, the ensure any contact made with the axle is hardly noticeable. I highly recommend these if your stock bump stops are just rubber covered steel blocks like the ones on my Xterra were.



by:

Very easy to install.



by:

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.


25
115
Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Recommended Suspension Enhancement for a 2024 GMC Canyon Pulling a Trailer
    Personally I wouldn't go with Timbren's for your needs. They're essentially rubber bump stops that prevent your suspension from flexing when weights placed on the rear of your Canyon. The major issue with them is comfortability when you are not towing your trailer. These significantly affect the range of your suspension which can leave you with a stiff rigid feeling in the rear end. Plus if you hit a bump while there's weight on them they tend to bounce. Instead, I recommend the SumoSprings...
    view full answer...

Info for this part was:

Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Michael B
Installed by:
Michael B
Employee Bethann B
Written by:
Bethann B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.