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Heavy trailers and campers can push your suspension to its limit, making the rear of your truck sag. The Timbren Suspension Enhancement System gives you 6,000 lbs of rear axle support to keep things level and steady. With the truck sitting right, braking and steering stay predictable, headlight aim stays true, and towing feels more controlled no matter how much weight is behind you.

Pile in tools, gear, or lumber without worrying about bottoming out. These hollow rubber springs take the strain off your stock suspension and reduce sag when the bed is full. The truck stays level so it handles better and brakes safer, even with a heavy or uneven load in back.

Bumpy roads and uneven ground don’t have to mean a rough ride. The Timbren springs absorb road shock and vibration before they reach the cab. They cushion each bump to make towing or hauling feel more stable and comfortable while helping protect your suspension components from excess wear.

When you’re cornering hard or carrying weight off center, each spring reacts on its own to keep both sides balanced. That independent action helps cut down on body roll and sway so the truck feels planted through curves, crosswinds, or uneven ground.

There’s no compressor to manage or air pressure to adjust—just solid, rubber support that goes to work automatically when you need it. Once installed, the system provides consistent performance every time you tow or haul without any upkeep required.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody. Andy here with etrailer.com. Let's take a real quick look at this Timbren rear axle suspension enhancement system. Now, these springs have been designed to fit your 2017 and newer Chevrolet Colorado 4 wheel drive and on custom fit parts such as these springs, I do recommend taking advantage of our Vehicle Fit Guide here at etrailer.com. Simply input the year, make, and model of your vehicle and any other questions that it might have, and our Fit Guide will confirm if this will work for you or if we have something comparable that will work for you. These hollow rubber springs have a capacity of 6,000 pounds and they're gonna mount to existing attachment points on your Colorado to give you strong rear axle support, to help reduce sag and improve handling.
Now, these springs are also going to give you additional support as needed, so you always have a smooth, comfortable ride allowing your leaf springs ample movement while cushioning light loads. And they're going to ride just as smoothly when you're not hauling a load. They become more rigid as more weight is added for greater performance when you're hauling a heavy load, increasing stability and reducing vehicle sag. They work independently, adjusting side-to-side, helping to compensate for off-center loads and reducing body roll when swerving and turning corners. These springs also act as shock absorbers, taking the brunt of bumps on rough roads, extending the life of your vehicle suspension.
So this kit does include everything that you see here. You're gonna get these two hollow rubber springs, vehicle specific brackets that, again, are designed for your Colorado. And then the bolts here are going to run through the springs to mount through the spacer and the heart, the bracket, here. So everything that you're gonna need to get these installed in place, along with instructions to guide you through that installation process. Again, the capacity is 6,000 pounds, but it is important to note that these Timbren springs do not actually increase your Colorado's weight carrying capacity, so you wanna be sure that you don't exceed the manufacturer's recommended weight limit.
Now if you do decide that these are going to be exactly what you need, that's great. Once you get these installed, we would love to hear back from you regarding your experience with them, and you can share your experience with us by dropping a comment or leaving a review on this product page. And if you leave a review, you can also send us some photos as well, showing us these in operation and letting us know how they're working out for you. We'd love to hear back from you. Well, I think that's gonna wrap up our look today.
I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews

Christopher H.
8/14/2026
Love hearing this! Really appreciate the detailed feedback and photos. That extra stability when you're loaded up can make a huge difference. And installing them at 11 at night—that's commitment. Hope they treat you just as well on those mountain roads. Safe travels and we'll definitely make sure Dee Dee gets the shoutout.


Lazer S.
8/19/2026
Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?

Jay S.
8/14/2026
Now that its been a year Im very impressed with them. Theres no ride detriment without the 5th wheel attached and they do a great job of mitigating squat

Christopher H.
9/3/2026
Happy to hear the Timbrens are making that big of a difference Tony. Thanks for including the photo and we appreciate the kind words! Have you taken any longer trips with the Timbrens installed?


Jesse M.
9/10/2026
Awesome! Glad to hear the Timbrens made such a big difference in the ride quality. Thanks for sharing! Happy travels!

Brooke M.
5/7/2025
Wow, thank you for sticking with us, Don! That is awesome. I think you made an excellent choice here. Timbrens are tough and the heavy duty are SUPER tough. Glad to hear these were a good fit. Love the photos! Is that your own property?

Don
5/21/2026
The TIMBRENs work as stated during when I am pulling anything heavy. However, when the truck is not pulling anything, anyone riding in the rear seat gets a very hard jarring jolt when driving over any roadway repairs, bumps, expansion joints on bridges. I wished that I would have went with the Super Springs, or the Road Active Suspension. I may replace the TIMBRENS later.


Kate F.
5/6/2026
Glad to hear the Timbren systems worked out so well for your RAM Van Mitchell! It’s great that you noticed the smoother, more progressive response compared to the factory bump stops, especially under load. Thanks for sharing your experience with both the front and rear installs, that’s really helpful for others considering the upgrade. What kind of loads are you usually hauling with your van?

Lazer S.
6/16/2026
They definitely look like they are helping, Orlando! How are they when you aren't towing? We hear a lot of people say they can be pretty harsh when unloaded.

Kate F.
7/13/2026
Bud, thank you so much for taking the time to leave a review! I'm glad to hear the suspension upgrade helped reduce the sagging and porpoising while towing. I also really appreciate you including the installation pictures and sharing your tip about removing the rear wheels. I'm sure that will help the next person tackling the install. Thanks again for choosing etrailer!

Heather A.
4/24/2026
Hi there, thanks for reaching out, that’s actually a common issue with this type of trim. The one you tried is a standard flat insert, but some RVs (like your NOBO) use a slightly domed trim to help it sit over the screw heads in the track. If the screws stick up even a little, a flat trim won’t fully snap in place, which sounds like what you’re running into. The best way to find the right replacement is to remove a small piece of your original trim, lay it flat, and measure the full width from edge to edge. Most are either 3/4" or 1", but the shape matters too, not just the width. If yours has that domed profile, you’ll want something similar or a softer vinyl that can flex over the screws. If you’re able to send a quick photo of your track or old trim, I’d be happy to help you find a better match.

Mike L.
4/23/2026
Niiiice, I see what you did there!! That looks like a sweet setup!


Mike L.
4/2/2026
Glad to hear they worked well for you Jerrod. Hope you had a good trip!

Lazer S.
7/20/2026
Glad they are working well for you, Kevin! Well, while you are towing, that is. We have heard that these can be pretty rough when unloaded, but work great when you are loaded. A quick release function on these would make taking them off when not towing a lot easier. I may pitch that to Timbren to see if they can work something out. I will tell them to call it something like the Kevin Device if they agree! ^___^ Sounds like quite the trip! What has been your favorite stop so far?
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Robin H.
9/22/2026
Thanks for taking the time to share such a detailed review and all of the pictures! The unloaded ride is a concern we hear fairly often with SES upgrades, so your experience with the 1" gap and rough-road testing will be really helpful to others considering these for their F-250. We appreciate the kind words about Naomi and our team as well. Looking forward to your update once you get some miles on them with the Rockwood!