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  1. Vehicle Suspension
  2. Timbren
  3. Bump Stops
  4. Towing/Load Leveling
  5. Extra Heavy Duty
  6. Rear Axle Suspension Enhancement
THIS ITEM IS NOT A FIT FOR
2017 Keystone Sprinter Travel Trailer
Timbren

Timbren Rear Suspension Enhancement System

Part Number: TGMRCK25D
$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension
Not Confirmed to Fit

2017 Keystone Sprinter Travel Trailer

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8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use. Great Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TGMRCK25D can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TGMRCK25D

  • Bump Stops
  • Towing/Load Leveling
  • Timbren
  • Extra Heavy Duty
  • Rear Axle Suspension Enhancement
  • Suspension Only

8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


Features:

  • Improves suspension, handling and safety
  • Provides additional support as needed, so you always get a smooth, comfortable ride
    • Allows the leaf spring ample movement and cushions light loads
    • Becomes more rigid as more weight is added
      • Increases stability - gives you great performance when you are hauling heavy loads
      • Reduces vehicle sag
  • Works independently - side to side
    • Helps to compensate for off-center loads
    • Reduces body roll when you have to swerve or execute a sharp turn
  • Acts as shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension


Specs:

  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 8,600 lbs
    • Do not exceed your vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guaranteed


An example of sag on a vehicle's rear axle under a heavy load

Whether you're hauling heavy loads in your bed or cargo area or you're towing a trailer, you will often see the rear of your vehicle sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but also more of the vehicle's weight. Because less weight is on the front axle, the front tires are making less contact with the road. Overall handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.


Diagram of the Timbren spring installed

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above the rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the spring sits, 1" above the axle. The inch of clearance allows the existing factory suspension to operate normally under light loads and standard terrain, ensuring the smooth, comfortable ride that you are used to.


Animation of a standard Timbren rubber spring

Timbren Suspension Enhancement Systems are designed to work progressively. When the hollow rubber springs are compressed, the convoluted design causes them to quickly collapse along the folds. Once the folds are compacted, the stacked barrel shape increases resistance, stiffening the suspension and keeping your vehicle level.


Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's side or passenger's side of your vehicle. This is helpful when you swerve or make sharp turns. Each spring is activated when it is needed, so body roll is greatly reduced. The independent action also works well when you are hauling off-center loads.


An example of a trailers swaying

Because the vehicle handles better with the springs, less turbulence will be passed along to the trailer, and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi), because the movement from the trailer is not transferred to your vehicle. This also works to make the sway subside more quickly.


An empty truck on a bumpy road without Timbren

Another great feature of the rubber construction is that the springs absorb most of the road shock, creating a smoother, more stable ride overall when loaded. Wear and tear on the factory suspension is also lessened because the rubber springs work to prevent bottoming out on rough roads.


Timbren Suspension Enhancement Compared to the Competition

Timbren's Suspension Enhancement Systems are much easier to install than air springs - there are no air hoses to run, no compressors or gauges to hook up, and no manual adjustments to make. The rubber construction makes Timbren's springs more elastic than similar products constructed of microcellular urethane. And more elasticity allows for a more comfortable ride when loaded or towing because the rubber has more travel.



GMRCK25D - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMRCK25D Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

4060 reviews
5 Stars
(3237)
4 Stars
(524)
3 Stars
(123)
2 Stars
(77)
1 Star
(99)
8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.

by:

Just finished the install and testing at a glance I would say the product is great very easy to install and helped with all things intended thanks.



by:

So far everything is working. Just as I though. The only complaint I have is the wait time that it took (12) days from the order date to when I receive the item.



by:

Needed this to lift and stabilize the rear end of my 2012 Sienna. Works very well!



by:

Didn't have all the hardware, I have to go buy all the nuts.(Didn't want to just say I have no nuts). But the product looks great and was a very easy install.



by:

These things work great. Un loaded still have a factory ride. Super easy install.



by:

Work great. I recommend them to everyone. Even I was able to install in 10 minutes



by:

Kept my truck level and no noticeable change to ride quality. With no load, they do not touch the frame.



by:

I received this item which I thought was new but someone had been through my item its an open box. SO I don't know if this came directly from etrailer or Timbrem its for sure an open box I should send it back just because. I am not happy getting an open box item someone has been through.



by:

Great product , it was easy to install and it supported the weight with no problems



by:

Interference from passing trucks on the freeway is reduced. They work as expected.



by:

Installs easily if you are handy. Works to provide added support. Does make ride stiffer.



by:

This is the way to go when u need extra support, it has been a great help when towing heavy



by:

We would not be without the product and will go to the site. It is wonderful!



by:

I am not happy at all with the product I received today. These are used parts. You can tell from the packaging that these are used parts and you can tell by the marks on the part itself. This is so freaking disappointing! I want a refund immediately.



by:

Perfect fit, easy to install, and they work as advertised. These are a nice improvement over the stock parts.



by:

Does the job and easy to install. Does make for a little rougher ride while towing but I’m used to it now



by:

Easy to install and stabilizes ride when hauling heavy loads. Would highly recommend.



by:

Works great. Still looks like new after a year and we use it hard.



by:

this fit perfectly on my 2016 nv2500. It really helped with my sag. would not hesitate to buy again.



by:

Working really well, should have bought this first. Very easy to install.



by:

Very easy to install and did everything it said it would do. I'm very pleased with the quality.



by:



by:

Excellent product. 2000 pounds in the box of my F-150, always stable on the
road.



by:

These work like a champ. Ten minute install and removes the rear end squat straight away.



by:

Odelia knows what she is talkin about. Give that girl all your money


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4060
Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Suspension Enhancement for 2020 GMC Sierra 2500
    If you're towing most of the time then I would go with the Timbren Rear Suspension Enhancement System # TGMRCK25D. These will provide the most support for your 2020 GMC Sierra 2500 while towing your 5th wheel. If you're more concerned about ride quality then the RoadActive Suspension # RAS3611-HD would be the better choice. The Timbren has a tendency to be a bit rough when you aren't towing or hauling. If you want the best option possible I would go with the Firestone Air Bags # F2709....
    view full answer...
  • Rear Suspension Helper Springs for a 2018 GMC Sierra 2500 Towing a 5th Wheel Trailer
    Hello, I will be happy to help you select some helper springs to improve the ride and level out the truck when you are towing. Timbren springs are an easy install but they will make the ride stiffer when you are not towing. The similar SumoSprings Solo # SSR-207-47 will also level out the truck but will not be as stiff when not towing compared to the Timbren springs. Another option to consider is RoadActive Suspension # RAS3611-HD. Installation is easy with this kit as well. It will...
    view full answer...
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  • Timbren or Hellwig Load Pro for 2023 Chevy Silverado 2500
    Hey Uwe, I would definitely go with the Hellwig Load Pro 35 part # HE93XR over the Timbren. The Timbrens are notoriously harsh and bouncy and since that's not what you want I would definitely avoid them at all costs. Hellwig will give you the support and stability you are wanting while actually improving the ride quality instead of hurting it. I have another option you might be interested in too if you'd be interested in?
    view full answer...
  • Does Using an Offset Gooseneck Ball Change where the Pin Weight is Carried in the Truck Bed
    If you were to use the 4 inch offset ball # BWGNXA4085 the pin weight on the ball will not be changed. What will change is where the weight is carried on the truck. Using the offset ball will put more weight 4 inches back from the center of the gooseneck ball hole in the truck bed. This may or may not affect the truck. Some things that could happen include reduced steering and braking and headlights angled upward. If the weight is far enough behind the rear axle it can lift the front...
    view full answer...
  • Can I Use Both The RoadActive Suspension Enhancement With The Timbren Suspension Enhancement?
    You can use both the RoadActive Suspension Enhancement Kit # RAS4611 and the Timbren Suspension Enhancement Kit # TGMRCK25D at the same time. The Roadmaster kit will take care of the travel the initial travel of your suspension, the Timbren will just support the suspension at the end of travel. Both will work great for enhancing your suspension throughout the complete travel of your suspension. They will not work against each other.
    view full answer...
  • Compatibility of the Air Lift LoadLifter 5000 Springs on a 2016 Chevy 3500 Cab and Chassis DRW
    The Air Lift LoadLifter 5000 Helper Air Spring, # AL88339, is confirmed to fit the 2011 to 2015 Chevrolet Cab and Chassis 3500. However, my contact at Air Lift confirmed that the there are no air helper spring kits that fit the 2016 and on models. But I have a solution for you. We do carry the Timbren Rear Suspension System, # TGMRCK25D. This system will replace the OEM bumps stops located on the rear axle of your 2016 Chevrolet Silverado 3500 Cab and Chassis. The Timbren Aeon rubber...
    view full answer...
  • Why Can't Timbren Be Used with 2025 Silverado Trail Boss (It Can!)
    I just confirmed with Timbren that the # TGMRCK25D DOES fit the 2025 Chevy Silverado 2500 Trail BOss.
    view full answer...
  • Lifted Truck Still Sagging with Equal-i-zer Weight Distribution System
    The adjustments for the Equal-i-zer Weight Distribution Systems like part # EQ37120ET will pertain to adding and removing washers from the head to try and get the spring arms as parallel with the trailer frame as possible. However, this may not completely level your vehicle. The majority of these systems are only designed to gain back half of what you lost and since your vehicle is lifted, there is an even greater chance that the vehicle will not be completely level. If you still seek...
    view full answer...
  • Suspension Enhancement Recommendation for 2016 GMC Sierra 3500 for Smoother Ride Unloaded
    We have found that the Timbren setups affect the unloaded ride quality of a vehicle more than the other suspension enhancement solutions. For a similar solution that we have found to be a bit less harsh the Firestone Work-Rite kit part # F8632 would be a great option.
    view full answer...
  • Choosing Between Timbren SES and RoadActive Kit for 2022 Silverado 2500 Towing 5th wheel
    Hey David! As long as you don't go over the 3,000 lb capacity I recommend the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-HD. The RAS is nice because it won't have a negative impact on your unloaded ride quality. It can also be adjusted if need be. If you think you'll be over 3,000 lbs the Timbren SES # TGMRCK25D is a better choice. However, these have a tendency to give you a harsh ride when you aren't towing or hauling. If you need the higher capacity and want...
    view full answer...
  • Comparing Timbren TGMRCK25D And TGMRTT35D For 2020 Chevy Silverado
    Hello Ken, thanks for reaching out. Both of the kits you mentioned, the Timbren # TGMRCK25D and # TGMRTT35D are correct for your 2020 Chevy 2500. The difference is the 25D is a standard duty kit, while the 35D is a severe service kit. The severe service kits are intended for vehicles with a constant heavy load in the bed like a truck bed camper, or salt spreader. They are designed to be constantly loaded. The standard duty kit is more suited for towing applications like travel trailers...
    view full answer...
  • Recommended Suspension Enhancement For A 2007 GMC Sierra 2500 With An In-Bed Camper
    Hi Mary, Do you leave the camper in the bed most of the time or does this truck spend a good chunk of time driving around without the camper? The SumoSprings Solo Custom Helper Springs # SSR-211-54 would be a great option if you leave the camper in the bed all the time. They take about 20 minutes to install and would just essentially replace the factory jounce stops for hassle-free, no-maintenance load leveling support. These have a 2,800lb capacity so they're be a bit stiff when the...
    view full answer...
  • Solution for Installing Timbren on 2012 Silverado 2500 With Rusted Bump Stop Cups
    Hey Cliff! I'm sorry to hear you ran into that problem installing the # TGMRCK25D on your truck. You might be able to get those from your local dealer but I'm not sure. You could also have replacements fabricated and then weld them on. Unfortunately, Timbren does not make a specific bracket or alternate mounting system for this issue. The only other option would be to switch from the Timbren SES to something like the SumoSprings Rebel # SSR-203-40-2 which uses brackets for mounting instead...
    view full answer...
  • Why is Truck Fifth Wheel Towing Capacity Much Higher than Cargo Capacity
    Fifth wheel towing capacities are different from cargo weight capacities. The reason is mainly that a fifth wheel hitch essentially attaches to the frame of the truck (the strongest part of it), and the cargo capacity is more related to the weight capacity of the truck's bed. Your truck would have no problem with the weight of your fifth wheel trailer plus the cargo you mentioned adding.
    view full answer...
  • Will Adding Timbren Bump Stops Affect The Adjustment Of My Weight Distribution Hitch?
    Hello Donny, thanks for reaching out. We do offer Timbrens for the 3015 Chevy Silverado 2500, for that I recommend part # TGMRCK25D. These likely will affect the adjustment of your weight distribution system. You will want to install the Timbrens first, then install and adjust the WD hitch as needed. What weight distribution hitch are you using?
    view full answer...
  • Suspension Enhancement for 2019 Chevy Silverado 3500 Cab and Chassis that is Towing Trailer
    We have suspension enhancement solutions that would work great on your truck but since it's a cab and chassis we don't have any air bag setups we can recommend.
    view full answer...
  • Does Timbren Suspension Enhancement Fit 2025 Chevy Silverado 2500 ZR2
    Hey Jordan, Yep, I went ahead and verified directly with Timbren the Timbren Suspension Enhancement System - Severe Service # TGMRTT35D are indeed a fit for your 2025 Chevy Silverado 2500 ZR2. That said, the Severe Service kit is designed for trucks that have in-bed campers or are used as work vehicles (like salt spreaders, etc.). So if you have an in-bed camper you keep on this will be great, but if you want the suspension upgrade for things like helping stay level while towing a trailer,...
    view full answer...
  • Timbren Kit Recommendation for 2022 Chevy Silverado 3500HD with Slide In Camper
    Hey Ted, yes Timbrens would be a great option to add additional suspension support to your 2022 Chevy Silverado 3500. For that I would go with the part # TGMRCK25D though over the # TGMRTT35D as it would still give you the support you are looking for without being too harsh. The part # TGMRTT35D is a severe duty application which I would only recommend if you are basically at the capacity of your truck and won't ever really drive it without the slide in camper.
    view full answer...
  • Which Timbren Kit Fits 2013 GMC Sierra 2500
    Hey Lyn, the correct Timbren kit for your 2013 GMC Sierra 2500 is the part # TGMRCK25D. This will offer you quite a bit of additional suspension support for your camper.
    view full answer...
  • Timbren Springs Options For A 2024 Chevy Silverado 2500HD 4 Wheel Drive
    Hi Curt! We have two Timbren options for your 2024 Chevy Silverado 2500 with 4 wheel drive and I have them listed below: Timbren Suspension Enhancement System - Severe Service - Overall kit height: 5-9/16” - 8,000 lbs # TGMRTT35D Timbren Rear Suspension Enhancement System - Overall kit height: 6-1/4” - 8,600 lbs # TGMRCK25D The main differences between them is the overall height and capacity. Even with the # TGMRTT35D being slightly smaller and lower capacity, it would be the stiffer...
    view full answer...
  • Suspension Enhancement For an in Bed Truck Camper for a 2015 GMC Sierra 2500
    Great question Brian! Timbrens are the most commonly recommended suspension enhancement recommendation when it comes to putting in a truck bed camper. It is very strong and reliable so would be a really great option for you. I looked up your camper and it looks like the dry weight is around 3k lbs so once you add in any gear, water, fuel, and anything else into the camper, part # TGMRCK25D would be what you want to get. It is classified as an extra heavy duty. Now here comes the however,...
    view full answer...
  • Can Timbren Kit Also Fit with 2021 Chevy Silverado 3500 Air Bags
    The Timbren Rear Suspension Enhancement System # TGMRCK25D replace the factory bump stop on a truck, which unfortunately happens to be the same place as the air bag kits so you won't be able to install these together on your 2021 Chevy Silverado 3500. If your truck has the factory upper overload springs then an alternative option for you is the TorkLift StableLoad Suspension Upgrade # TLA7200. This installs to the sides of your leaf springs so it will fit with your air bag kit just fine.
    view full answer...
  • Recommended Spacers for a Timbren Suspension Enhancement Kit
    Welcome back! The Timbren Spacer Kit item # T68MR is exactly what you need. They have a 3/8" bolt hole opening that will work with the Timbren item # TGMRCK25D you purchased awhile ago. Timbren recommends a 1" gap between the jounce spring and your axle.
    view full answer...
  • SumoSprings or Timbrens For 2023 GMC Sierra 3500 Towing 5th Wheel Trailer
    Since you want to keep your factory ride as much as possible on your 2023 GMC Sierra 3500, definitely still go with the initial recommendation of the SumoSprings Rebel Custom Helper Springs # SSR-203-40-2. The Timbren # TGMRCK25D will do the job, but are going to be much harsher. They are made of a hollow rubber that is very dense and you'll 100% feel it more than the SumoSprings when travelling with your trailer or unloaded. Keep in mind you will still feel the SumoSprings engage, but...
    view full answer...


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