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1977 Fiat 124
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Timbren Rear Suspension Enhancement System
Part Number: TMBRSP25A
In Stock
$269.36
Retail:$398.08
You Save: $128.72
1977 Fiat 124
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- Reviews (7296)
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Timbren Vehicle Suspension - TMBRSP25A
Highlights
- Custom Fit for Your Vehicle: Mounts to existing attachment points
- 6,500-lb Load Support: Keeps your vehicle level and steady when hauling or towing heavy weight.
- No-Drill DIY Install: Bolts to factory points with custom brackets and hardware for simple setup.
- Smooth, Stable Ride: Rubber springs absorb road shock and cut bounce for better control under load.
- Handles Off-Center Loads: Each spring works independently to balance uneven cargo or sharp turns.
- Protects Suspension Life: Cushions bottom-outs and reduces wear on leaf springs and shocks.
Features to know about
Stay Level and Confident Under Heavy Loads: 6,500-lb Rear Suspension Support
When your rear end starts to sag under a heavy trailer or bed load, these hollow rubber springs provide up to 6,500 lbs of support to keep things level. The Timbren Rear Suspension Enhancement System sits above the rear axle and works with your factory suspension to stabilize handling and braking under load. It keeps the truck from squatting and helps maintain steering control and proper headlight aim even with serious weight on the back.
Smooth Out Rough Roads: Progressive Rubber Springs that Absorb Shock
Bumps, ruts, and rough pavement don’t have to beat up your suspension. The Aeon hollow rubber springs compress progressively, soft at first for comfort and then firmer as weight increases. That design cushions light loads, absorbs road shock, and helps prevent bottoming out when things get rough. The rubber construction adds elasticity that gives a smoother, more stable ride when loaded compared to stiffer materials like microcellular urethane.
Stay Steady in Crosswinds and Turns: Independent Spring Action
Each spring works independently so one side can react without affecting the other. That independent action keeps the vehicle balanced through sharp turns or uneven loads and helps cut down body roll when swerving or cornering. With better roll stability, less sway, and a more planted feel, your vehicle stays composed even when a trailer starts to move around in crosswinds or when hitting uneven ground.
Simple Install with No Air Lines or Adjustments
There’s no need for compressors, air hoses, or manual adjustments. This system replaces the factory bump stops and bolts directly onto existing frame rails—no drilling required. The included custom-fit brackets and hardware make installation straightforward for anyone comfortable with basic tools. Once installed, the springs require no maintenance and automatically provide the right amount of support as your load changes.
Specs
Weight and Capacity
- Capacity: 6,500 lbs
Compatibility and Design
- Designed to work with: a suspension system that is in good working order
Warranty
- Limited lifetime warranty: satisfaction guaranteed
MBRSP25A Timbren Rear Suspension Enhancement System
This Product Fits The Following Vehicles
- 2020 - 2020 American Coach American Patriot Cruiser Motorhome SD-A - 2 Wheel Drive
- 2020 - 2020 American Coach American Patriot Cruiser Motorhome SD-A - 4 Wheel Drive
- 2020 - 2020 American Coach American Patriot Cruiser Motorhome SD-B - 2 Wheel Drive
- 2020 - 2020 American Coach American Patriot Cruiser Motorhome SD-B - 4 Wheel Drive
- 2022 - 2023 American Coach American Patriot Motorhome 144 - FD2
- 2020 - 2020 American Coach American Patriot Motorhome FD2 - 2 Wheel Drive
- 2020 - 2020 American Coach American Patriot Motorhome FD2 - 4 Wheel Drive
- 2021 - 2021 American Coach American Patriot Motorhome FD2 Loftbed - 2 Wheel Drive
- 2021 - 2021 American Coach American Patriot Motorhome FD2 Loftbed - 4 Wheel Drive
- 2021 - 2021 American Coach American Patriot Motorhome FD2 Lounge - 2 Wheel Drive
- 2021 - 2021 American Coach American Patriot Motorhome FD2 Lounge - 4 Wheel Drive
- 2019 - 2019 American Coach American Patriot Motorhome SD Dinette
- 2019 - 2019 American Coach American Patriot Motorhome SD Lounge
- 2020 - 2023 Pleasure-Way Ascent Motorhome TS
- 2022 - 2022 Tiffin Cahaba Motorhome 19SC
- 2008 - 2008 Airstream Interstate Motorhome 22 Dinette Lounge
- 2008 - 2008 Airstream Interstate Motorhome 22 Front Sleeper
- 2008 - 2008 Airstream Interstate Motorhome 22 Rear Dinette
- 2008 - 2008 Airstream Interstate Motorhome 22 Rear Sleeper
- 2019 - 2023 Airstream Interstate Nineteen Motorhome Base
- 2021 - 2021 Airstream Interstate Nineteen Motorhome Base - 2 Wheel Drive
- 2021 - 2021 Airstream Interstate Nineteen Motorhome Base - 4 Wheel Drive
- 2022 - 2023 Entegra Coach Launch Motorhome 19Y
- 2022 - 2022 Pleasure-Way REKON 4x4 Motorhome 4x4
- 2023 - 2023 Winnebago Revel Motorhome 44E
- 2022 - 2023 Thor Sanctuary Motorhome 19L
- 2022 - 2023 Thor Sanctuary Motorhome 19P
- 2007 - 2009 Dodge Sprinter 2500
- 2007 - 2015 Freightliner Sprinter 2500
- 2010 - 2015 Mercedes-Benz Sprinter 2500 See All Vehicle Fits
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
- Wrong item was ordered
- Defective
- Too difficult to install
Ratings & Reviews
4.7
7296 reviews
by:
Dan
09/08/2025
Mercedes-Benz
Sprinter
This product for the sprinter van has no mechanical fasteners and will fall out when used. I purchased a second set and fastened them to the chassis and they work great. don't make the same $[XX] mistake and donate them to the side of the road.
by:
Trent
04/02/2025
Mercedes-Benz
Sprinter
The Timbren suspension enhancement system definitely improved the handling on our Sprinter van.
by:
Lance
09/23/2020
Mercedes-Benz
Sprinter
I had a couple of heavy loads in my sprinter to the point of resting on the timbrens. They kept the load level and steady as we drove our first 500 miles of the 1300 we do every week. I would highly recommend Timbren suspension.
by:
Samuel
06/26/2024
They are so easy to install they just replace the factory bump stops. You have to be aware of dips and valleys and speed bumps because you have the weight in direct contact with the axle, so you have to use caution at times of uneven roads. But they do just what they are suppose to do! Great product .
by:
Andrew A
05/16/2019
2014
Ram
2500
Works amazing on my 2014 Mercedes Sprinter 2500. I have zero rear end droop due to weight. Love them and absolutely worth the money.
by:
Dennis
09/02/2022
Suspension springs added support and enhanced the ride. Would do them again with no hesitation.
by:
Sam
03/24/2025
Two years later and still working for what they are intended to !
by:
Arthur
04/01/2023
Mercedes-Benz
Sprinter
Great addition to the rear of my 170 Mercedes Sprinter.
by:
Ed
10/04/2024
Subaru
Forester
These were very east to install and helped remove the excessive sway when pulling out of parking lots and when truck pass. Installed on a Forester MBS 2401T motorhome.
by:
Thomas
01/21/2023
Did not level the van…did stabilize some roll
by:
Stepsaver
05/22/2025
by:
Vasile
08/14/2022
by:
Lawrence
04/21/2024
2019
Mercedes-Benz
Sprinter 2500
by:
Jerry
11/29/2024
2023
Mercedes-Benz
Sprinter 2500
by:
Daniel
04/11/2021
by:
Mark
05/16/2025
by:
Lino
07/24/2021
2021
Mercedes-Benz
Sprinter 2500
by:
Darrell
07/10/2023
by:
Oleg
02/19/2021
by:
Adam
08/12/2026
I'm suitably impressed with the difference i feel.
I have about 250 lbs. of static load with my topper and Decked cargo system. This put my install gap with no spacers just under the reccomended 1 inch minimum.Then add a couple hundred more pounds hauling music gear 100 shows a year, and the stop is resting on the axle.
I feel the absorption of the Timbren material is better than the flimsy stock bump stops. More cushion.
Where i really feel the difference is in the stabilty of excessive side sway when turning while loaded.
I have a gig coming up that will involve some unpaved mountain roads to get there so I think i will have a real goid idea of how these Timbren's will perform.
Instalation took me about an hour at 11 p.m.
The product it of the highest quality in design and build.
And Etrailer is a company that I would not hesitate to buy from in the future.
Thanks Dee Dee.
You rawk!!
I have about 250 lbs. of static load with my topper and Decked cargo system. This put my install gap with no spacers just under the reccomended 1 inch minimum.Then add a couple hundred more pounds hauling music gear 100 shows a year, and the stop is resting on the axle.
I feel the absorption of the Timbren material is better than the flimsy stock bump stops. More cushion.
Where i really feel the difference is in the stabilty of excessive side sway when turning while loaded.
I have a gig coming up that will involve some unpaved mountain roads to get there so I think i will have a real goid idea of how these Timbren's will perform.
Instalation took me about an hour at 11 p.m.
The product it of the highest quality in design and build.
And Etrailer is a company that I would not hesitate to buy from in the future.
Thanks Dee Dee.
You rawk!!
by:
Ryan
08/16/2026
2024
Toyota
Tundra
Timbren Spring Helpers were exactly what I needed on my Tundra plus a spacer kit since I have a 3” TRD lift. They were packaged neatly, with proper hardware, and excellent instructions! They absolutely do exactly what they are supposed to do! Truck rides much better and helps level out the load!
Lazer S.
8/19/2026
Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?
by:
Jay S.
08/13/2025
2022 F250 Super Duty. Super easy to install. I have about 3/4" gap between the spring and the plate. Time will tell how they impact the ride quality and how much sag they mitigate with my 5th wheel hooked up.
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
by:
Don
05/05/2025
Absolutely Pleased with the TIMBRENS. They were easy to install, and took less than an hour to install both. I noticed a slight stiffness in the ride as the rear bounced over a bad roadway. Towing is great, with a nice level and smooth ride. I am glad that I did not order the heavier duty Timbrens, than what was recomended for my truck. I believe the ride would have been too stiff. If you look at the photos showing the timbrens, the truck is still lifted in the rear, so what you see is a big gap between the rubber, and the steal plate. When the truck is lowered, there's 1" of space as it should be. BTW, I have been purchasing from etrailer for years now, and I have to say that I have never had any issues with any orders. They are my go to folks for all of my vehicle suppension stuff and trailer stuff. You can't go wrong with buying from them.
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.
Gwendolyn Y.
5/21/2026
@Don I'm sorry to hear that the Timbrens didn’t pan out to be as great as you originally hoped. Swapping over to the SuperSprings or the RoadActive Suspension will definitely have less of an impact on your day-to-day driving. Out of the two, the RoadActive Suspension would have the least effect.
If you ever have questions about the RoadActive Suspension or the SuperSprings, let me know and I’d be happy to help out.
by:
Mitchell
05/02/2026
It has been almost a year since I installed Timbren Suspension Enhancement Systems (DVF350 and DVR350R) on the front and rear of my 2003 Dodge RAM Van 3500. These bumpers replaced the OEM bump stops that were on my van. I like the Timbren bumpers much better than the OEM bump stops because they provide a progressively cushioned response for suspension compression when traveling over significant humps like speed bumps in a parking lot, or curb ramps into driveways. I did not like the abrupt stop the OEM bump stops provided when traveling over the same objects. I installed the Timbren rear bumpers first, and after a few months of use, I decided to add them to the front. In both cases, the front and rear Timbren bumpers were easy to install once the OEM bump stops were removed. Installation required reuse of the factory hardware. On my van, the Timbren bumpers are not always engaged. Under normal load and travel conditions the bumpers are relaxed and about 1/2” away from the suspension landing points. However, their presence is much appreciated and very noticeable when the van is carrying heavy loads or handling significant humps.
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?
by:
Orlando
06/14/2026
The timbres bump stop is exactly the right height to meet the axel when the trailer is connected with all its weight onto the hitch. I have an Andersen weight distribution hitch and it levels out perfectly. The day picture is with the coach (Winn 2100bh) with factory equipment. The night picture is after the timbres are in place. Looks good.
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.
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See what our Experts say about this Timbren Vehicle Suspension
- Height of Timbren Rear Suspension Enhancement System Item # TMBRSP35B, TMBRSP35A, and TMBRSP25AI spoke with my contact at Timbren and the overall height (with spacers) for the part # TMBRSP35B that you referenced is 6-3/8 inch, the height of the # TMBRSP35A is 5-7/8 inch, and the # TMBRSP25A is 5-3/8 inch.
view full answer... - Air Helper Springs For A 2020 Mercedes-Benz Sprinter 2500The Timbren Rear Suspension Enhancement System # TMBRSP25A are confirmed to fit your 2020 Mercedes-Benz Sprinter 2500. Using this system will improve your suspension, handling and safety. They will also absorb road shock and improving roll stability. They have an easy installation with no drilling required. The system has a 11,000 pound capacity but do not exceed your vehicle's weight carrying capacity. Firestone does not have airbags available for your vehicle. I attached a review...
view full answer... - Best Option for Sway Control on a 2012 Mercedes-Benz Sprinter 2500Both the Timbren Rear Suspension Enhancement System part # TMBRSP25A and the SumoSprings Maxim Custom Helper Springs part # SSR-326-47-1 will help reduce the swaying and rocking issues you are having with your 2012 Mercedes-Benz Sprinter 2500. However, both of these products are more or less geared towards load leveling not necessarily sway control. The best option I have to help with swaying and rocking is a rear sway control bar or on vehicles that already have a rear sway control bar,...
view full answer... - Will Timbrens for a 2022 Mercedes-Benz Sprinter 2500 4x4 Lift the Rear EndThe Timbren Rear Suspension Enhancement System part # TMBRSP25A that you asked about won't provide a lift, they will simply prevent sag once a load is applied. These are more so designed for when towing as they mainly just engage when that load is present.
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view full answer... - Suspension Enhancement Recommendation for 2014 Mercedes-Benz Sprinter 2500The Super Springs SumoSprings Solo # SSF-106-40 is for the front axle suspension of the 2014 Mercedes-Benz Sprinter 2500 or 3500. The SumoSprings Maxim # SSR-336-54-1 is for the rear axle of the 3500. For your 2014 Mercedes-Benz Sprinter 2500, I recommend the Timbren Rear Suspension Enhancement System # TMBRSP25A. Trimbren's hollow rubber springs will replace the existing axle bump stops and works to increase stability, reduce rear end sag, and extend the life of your suspension.
view full answer... - Recommended Suspension Enhancement for 2013 Mercedes-Benz Sprinter 2500The load that you are carrying on a daily basis is causing your 2013 Mercedes-Benz Sprinter 2500 to sag and bottom out. You will need suspension enhancement and I strongly recommend the Timbren Rear Suspension Enhancement System # TMBRSP25A. These work independently of one another so if an uneven load in the back of your van that you would still be level when driving. These springs do not require drilling to install or any maintenance after you have them installed.
view full answer... - Are There SumoSprings That Fit a Four Winds Chateau Citation On Mercedes Benz Sprinter ChassisThe Four Winds Chateau Citation is built on a Mercedes Benz Sprinter Chassis. I checked with SumoSprings and they don't offer any solutions for this chassis but I do have options from Timbren which are very similar to the SumoSprings. They have the Timbren Suspension Enhancement System part # TMBFSP35 for the front and part # TMBRSP25A for the rear so that is what I recommend using. The Timbrens actually provide more support than the SumoSprings.
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- Recommended Rubber Suspension Springs for a 2022 Jayco Terrain 19Y on a 2021 Sprinter 2500 Chassis Hey Magdi, welcome back! Your 2022 Jayco Terrain 19Y was built on a 2021 Mercedes-Benz Sprinter 2500 4WD chassis. You'll need the Timbren Rear Suspension Enhancement System item # TMBRSP25A you were looking at. The Timbren item # TMBRSP25A is going to replace your rear bump stops and bolts directly to the factory perches. They have a 6,500 lbs capacity that is going to help with rear end sagging, sway, and absorbing bumps on a rough road. What kind of issues are you having with your...
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Info for this part was:
Written by:
Tyler C
Installed by:
Jeff D
Installed by:
Robert C
Expert Research:
Jameson C
Video Edited:
Dustin K
Video Edited:
Chris R
Updated by:
Mary K
Updated by:
Wilson B
Updated by:
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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.