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SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
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SuperSprings Intl

SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle

Part Number: SSR-128-40-2
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3,000-lb Capacity. These maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. Each 2-piece spring connects at top and bottom and provides unlimited suspension travel and movement for a smooth, comfortable ride. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle part number SSR-128-40-2 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension - SSR-128-40-2

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • SuperSprings Intl
  • Standard Duty

3,000-lb Capacity. These maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. Each 2-piece spring connects at top and bottom and provides unlimited suspension travel and movement for a smooth, comfortable ride.


Features:

  • Helper springs upgrade your vehicle's rear suspension for improved driver control and comfort
    • Keep your vehicle level when you're towing or hauling a heavy load
    • Help to absorb bumps and shocks
    • Minimize sway
  • 2-Piece design provides unlimited suspension travel and movement for a smoother ride when unloaded or on rough terrain
  • Progressive load control - springs compress according to the weight of your cargo
    • Lighter loads - springs compress easily at first for soft engagement and a less bumpy ride
    • Heavier loads - springs compress by as much as 80 percent for support
  • Springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns
  • Durable microcellular urethane
    • Works in temperatures from -25 F to 200 F
    • Resists damage caused by oils, road salts, and UV rays
  • Minimal lateral expansion - springs expand and compress vertically instead of to the sides so they aren't easily damaged when operating in tight spaces
  • Maintenance-free - no tubing to run or air pressure to monitor like with air springs
  • Easy, bolt-on installation
  • 2 Jounce-style springs and necessary hardware included
  • Made in the USA


Specs:

  • Weight capacity (at 50-percent compression): 3,000 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee


Rear Suspension Support

SumoSprings helper springs are great for vans. Towing or hauling a heavy load can cause sag as your factory suspension compresses under the weight of the load. This means that the rear axle is trying to support not only the extra load but also the van's weight. And because there is less weight on your front axle, your front tires make less contact with the road, which causes problems with traction, steering, and braking. SumoSprings upgrade your factory suspension to level your vehicle, improve driving performance, and keep your ride comfortable.


SumoSprings Rebel installed showing separation of 2-piece springs

The innovative 2-piece design of these Rebel springs allows for unlimited suspension travel. This means that there will be more movement in your suspension when you're unloaded or off-roading, which makes your ride smoother and more comfortable.


Each spring has 2 pieces. One piece attaches to the frame of your vehicle. And the other piece attaches to the axle, typically above your existing factory leaf spring. The pieces come together to provide support when you are towing or hauling a heavy load. When you're unloaded, they separate so that they don't restrict the movement of your suspension. The closed-cell urethane springs also act like a shock absorber to dampen road vibration.


SumoSprings compressing under load

SumoSprings provide progressive load control - the more you load them, the stiffer they become. With a lighter load, the springs will compress easily for soft engagement and a less bumpy ride. The springs can also compress by as much as 80 percent to support a heavy rear load and to help your factory suspension bear up under the load. This evens out the weight, which levels your vehicle and ensures that your front tires are making better contact with the road. A level ride means that you have improved driving control, ensures safe headlight aim, and helps to minimize sway. The springs also support your factory suspension, which helps prevent sagging and reduces bottoming out.


The springs work independently from one another to support each side of your vehicle. This action helps to reduce body roll when you make a sharp turn. This also helps compensate for an off-center load.


Durable, Custom-Fit Springs

These microcellular urethane springs are tough. They resist abrasion, oil, salt, and UV rays that can more quickly wear out other springs, and they perform well in temperatures ranging from -25 F to 200 F (-33 C to 93 C).


SumoSprings expand and compress vertically with minimum expansion to the sides, so they won't be damaged by nearby mechanical parts, and they fit safely into tighter spots. And unlike air springs, SumoSprings require no maintenance or adjustment.


This kit comes with custom-fit brackets that are designed to easily bolt onto your vehicle.



SSR-128-40-2 SuperSprings Sumo Springs Rebel Rear Vehicle Suspension Kit for Trucks - 2-Piece

Installation Details SSR-128-40-2 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle - SSR-128-40-2

Average Customer Rating:  4.8 out of 5 stars   (563 Customer Reviews)

3,000-lb Capacity. These maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. Each 2-piece spring connects at top and bottom and provides unlimited suspension travel and movement for a smooth, comfortable ride.

by:

The Sumo mount had to be slightly modified on the drivers side (removed a 1/2" by 1/2" chunk of the plate) with a grinder to get it to fit on my 2022 f350 4x4. I contacted the manufacturer prior to making the modification. They did not have an issue. The Sumo reduced truck squat (approx 3/4") allowing the truck to ride level with a trailer (8k hitch mount and 17k gooseneck). When you hit a pothole, the impact felt in the truck was jarring and caused the truck to become unstable. The Sumo eliminated this problem. I chose the blue over the yellow after watching a video on etrailer about ride comfort. I added front Sumos after I installed the rear Sumos. The rear provided the a more noticeable improvement. I chose Sumos over air bags because they eliminated air leak maintenance and air pressure adjustments depending on the load.



by:

These things are amazing! I had doubts, but I figured for the price why not give it a try. The sag is gone when pulling my 5er. My 350 has a 3” lift and sits perfectly level unloaded so any sag shows instantly. These “springs” eliminated the sag and made the ride10x better. Only dropping one star because the kit only came with 4 flange nuts, supposed to have 8 in the kit. Luckily I had 4 with the correct thread pitch laying around.



by:
2022 Ford F-350 Super Duty



by:

Front and rear Sumo Springs installed. Have not had a chance to hit the highway as yet. Locally a very good ride. Thanks to Joanne K. for all of her help.



by:

I installed these front Sumos on my 2023 Ford F53 chassis Class A Tiffin for several reasons. The factory bump stops had fallen out so something needed to be installed. I decided to invest in the Sumos to provide suspension support and get all the benefits of Sumos. I installed them, test drove the coach and am pleased with the results. They help cushion the front end and provide anti roll assistance. They work well with the Konis to soften the natural harshness of leaf springs. I’m very pleased with this addition.



by:

I put a small leveling kit in my 2500hd Silverado. I noticed afterwards towing my excavator or dump trailer I was getting some rear sag when I had my trailers loaded heavy. I considered doing air bags for the rear. Instead I installed the sumo springs. I installed them in about an hour. Very happy with them. No noticeable difference in ride quality while empty. And they keep my truck level when I’m hauling my trailers. 5 stars!



by:

Installation hardware did no work for my F53 chassis



by:

These springs made a big difference in the handling of my Newmar Baystar 31' motorhome. Much improved ride compared to the factory suspension.



by:

I put front sumos on my 35’ class A MH in 23. (22k F53 chassis). I noticed reduced front sway and better tracking. Especially improved when semis pass. I then put rear sumos on along with a 1-3/4 sway bar on the rear this year,24. Improved handling and ride all around. Nothing more to do. All for under $[XX].



by:

Upon arrival I noted the Sumo Springs parts were well made and came with excellent installation instructions. I'm installing the springs to mitigate rear squatting of my 2015 GMC 2500HD 4x4 Danali when pulling our 5th Wheel Camper.
During installation two issues were identified.
1) the (2) top plates required some rehemming as the (2) center holes on each plate would not line up with top spring mounting plate holes allowing easy bolt up.
2) recommend manufacturer look at the passenger side rear bottom plate J-hook location as it interferes with the emergency brake cable bracket mounting bolt location and barely clears rear shock absorber.
Bottom line, regardless of good installation instructions be prepared to use your mechanical skills to complete job.



by:

Installed front first and then took a trip on a curvy mountain road. I found they made a significant change in the ride and the sway. Very good update to a 2019 Ford F53 25000 chasis.



by:

I haven't had the springs under load, yet. I'm sure they'll perform as expected. I was not able to adjust the driver's side springs so that they align correctly. (see pic). The bottom spring does go into the top spring, but it's off enough that over time it will be an issue. Passenger side is spot-on! I have a 2024 F350 Tremor



by:

The product did a good job in reducing body roll in the 2025 Winnebago View 24t. The instructions were less than helpful - they need to be rewritten for better clarity, orientation, and specificity for the Mercedes 2023 Sprinter 3500 XD AWD. I had considered Timberens, but I think these will do a better job in the long run.

I replaced both the front and rear helper springs. The tolerances on the front were really tight - doable but really tight. Don't have any suggestions for getting the springs bolted on other than to be patient, it's a tight fit and smaller hands would have helped, but no such luck - it just took patience. No big surprises, basically remove and replace - just be cautious on raising and lowering the front end. Wheel blocks and frame supports are mandatory for safety.

As far as the rear helper springs, the designers planned for the potential rerouting of lines on the left side of the coach quite nicely. Takes some time, DON'T lock tite anything until installation is complete, run around the block a couple of times, and readjusted for fit. The factory frame bumpers can be removed very easily with a pair of channel locks, rather than messing around with screwdrivers and prybars. Takes all of two seconds and the bumpers were removed without damaging the bracket.

Communications with etrailer were great, probably overthought the project a bit but the representatives were great in keeping my thoughts corralled. The installation took longer than I expected but it was great fun, so who really minds additional time to do the job right.



by:

I have a 28-foot-long class A motorhome on a Ford F53 Chassis. The handling of the vehicle at any speed above 50 mph is terrible. The vehicle wanders all over; very difficult to keep the vehicle between the lane marker lines. The SumoSprings, installed front and rear, did not solve this problem. Money would have been better spent elsewhere!



by:

they were a great investment for our motorhome. Swaying now is very little and it has to be very windy for me to notice. I will never own another motorhome without sumo springs. I have a forest river fr3 30ds 2021. Easy to install yourself.



by:

We have a 2009 build F53 chassis on our 2010 Windsport 32A. I ordered these Sumo springs for the front axle. Hated how bad our coach dashboard would shake and rattle when going over bridge transitions, potholes, and concrete roadway section breaks. Took about an hour and were easy to install alone. Couldn't believe how much these helped the front axle. Worked so well I recently bought a set for the rear axle also. Those are a bit harder to install due to having to drill holes in frame rails to mount the upper bracket and glad I had friend to assist me. Would have only taken a little longer without the help but still easy to do by basic mechanic skills. With having both now we can certainly tell the difference and wished I had bought them sooner.



by:

The work great! Was going to go with the Air-Ride air bags in the front but folks had noted that the bags are strained when the leveling pulls the front wheels up to the point of coming off the ground. Glad we went with these. The person I put this on for is Handicap (or Handicapable as she says!) and these do not require air or making sure the pressure(s) are correct and holding.
It was a pain in the butttt get the original jounce bumper off the drivers side, but we muscled through it!! Thanks, Amy, for your help in ordering!! v



by:

These helper springs made an amazing difference in the stability and ride comfort in our coach. Improved cornering and bounce control were immediately apparent. Plus, crosswind driving is much improved. The split design makes leveling easy as I typically raise the front of the coach rather than the rear. Installation is a lot of work, but can be done yourself with the right equipment. Very pleased.



by:

The front Sumo Springs made a major difference in the stability of my Winnebago motorhome. It handles the bumps much better without major jarring of the passengers and dampens the side to side motion in turns and under crosswinds.



by:

Love these. Were easy to install and work great. No complaints. Maintains ride height even with 10,000lbs on the trailer. “F-250 with gooseneck” for reference.



by:

Definitely helped keep my RV more stable on the uneven secondary roads and the push from big rigs as they pass by



by:

Ordered the sumo springs on a Thursday and received them on a Thursday used the on line video they have had had them installed in no time this isn’t the only product I have gotten from them and will continue to use them great service



by:

I installed the Sumo Springs prior to a 7500 mile trip on my 22GMC 2500. We was pulling our 34 foot Travel trailer and I believe the springs made all the difference in ride stability as well as control while pulling.



by:

I received these yesterday and installed today. No issues installing other then recognizing that there are two different size carrier bolts for the front and back of the lower plate, Whet for a quick test dive and it appears that they have reduced the swaying from side to side significantly. Can't wait for the next trip to give a final endorsement.



by:

My THOR motor coach has the Ford F-53 chassis. I rides like a truck. That should not be surprising as "it is a truck." I purchased and installed these Sumo Springs and even though it will never be "air bag" suspension, the Sumo Spring made a wonderful difference in improving the ride. I would recommend this add on to everyone and as I meet similar motor coaches on the road, I show them the Sumo Springs and I do recommend them.


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See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • What Replacement Bump Stops Are Confirmed to Fit a 2024 Ford F-350 Super Duty?
    Here is a list of the bump stop replacements we have which fit your 2024 Ford F-350. If you can tell me how you plan to use your F-350 I can give you my personal recommendation for the option which works best for you. Timbren Front 2WD # TFF350SD2 4WD # TFF350SDC Timbren Rear 2WD/4WD # TFRTT350J SumoSprings Front 2WD/4WD 1,000LB # SSF-111-40 2WD/4WD 1,500LB # SSF-111-47 SumoSprings Rear 2WD/4WD 3,000LB # SSR-128-40-2 2WD/4WD 1,500LB # SSR-127-47 2WD/4WD 2,800LB # SSR-127-54 2WD/4WD...
    view full answer...
  • What Sumo Spring Should I Install On My 2015 Ford F-250 Super Duty
    When installing Sumo Springs on your 2015 Ford F-250 Super Duty I Recommend The SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-114-47. The Sumo Springs have a 1,500 pound capacity. The helper springs keep your vehicle level when you're towing or hauling a heavy load, help to absorb bumps and shocks, and minimize sway. It has a simple, no drill installation. I have attached a review video link below.
    view full answer...
  • Recommended Helper Springs For 2022 Ford F-250 Super Duty 4X4 Short Bed
    I recommend the SumoSprings Rebel Custom Helper Springs # SSR-128-40-2 for your 2022 Ford F-250 Super Duty 4X4 short bed. These springs are progressive so when you are driving with no weight or little weight it will not act harshly like some of the other heavier rated springs. As weight is added to the suspension the springs will compress adding additional support to your suspension helping to keep your F-250 level and provide you with a stable ride. The springs will also help cushion additional...
    view full answer...
  • Which SumoSprings Rebel Fits 2018 Ford F-250 4x4
    For your 2018 Ford F-250 4x4 the correct SumoSprings Rebel is the part # SSR-128-40-2 and not the other one you mentioned. The 4x4 and 4x2 models of your truck have slightly different suspension setups which is why there is a different fit created for both versions.
    view full answer...
  • Comparing The Solo And Rebel SumoSprings Options For 2022 Ford F-350 Super Duty
    Between the SumoSprings Solo Custom Helper Springs # SSR-127-54 and the SumoSprings Rebel Custom Helper Springs # SSR-128-40-2, I do prefer the Rebel. The Rebel's 2 piece design allows for better compression and movement with the axle, giving you a better and more comfortable ride. The higher capacity, though pretty small, does also lend itself towards more heavy duty trucks, like your 2022 Ford F-350. This means they will suit your needs better and will be the better option. I also like...
    view full answer...
  • Timbren vs SumoSprings for 5th Wheel Towing with a 2022 Ford F-350 Super Duty 4x4
    I definitely understand the confusion, as both kits look similar. The kit I recommend for your 2022 Ford F-350 4x4 though is the Rebel kit from SumoSprings: - SumoSprings Rebel Custom Helper Springs # SSR-128-40-2 The reason I like this over the Timbrens is because the Timbren springs tend to be less forgiving. While that initially sounds like a good thing for heavy duty towing, it also means you're going to feel it when you aren't towing. SumoSprings has done an excellent job at combining...
    view full answer...
  • Comparing SumoSprings Vs Timbren For A 2022 Ford F-250 Towing A 10,000lbs 5th Wheel
    The Timbren Suspension Enhancement # TFRTT350J has a maximum capacity of 8,000lbs and installs directly to your frame with no drilling required. Whereas, the SumoSprings Rebel # SSR-128-40-2 have a maximum capacity of 3,000lbs at 50 percent compression. In your application I recommend the Timbren Suspension Enhancement # TFRTT350J for its higher payload capacity since you mentioned you were going to be towing a heavier 5th wheel at 10,000lbs. However, it is possible that you may have a...
    view full answer...
  • SumoSPring Recommendation for my 2020 Ford F-350 Dually without Jounce Bumper Stops
    I have two good options for your 2020 Ford F-350 Dually that does not have the jounce bumper stops present. The SumoSprings Solo Custom Helper Springs part # SSR-127-47 are designed to give 1,500 lbs. of load leveling support and the SumoSprings Solo Custom Helper Springs part # SSR-127-54 are designed to give 2,800 lbs. of load leveling support. These have a one piece design and have spacers that will allow you to take up the gap between where the jounce bumper is on most vehicles and...
    view full answer...
  • Weight Capacity of SumoSprings Kit # SSR-128-40-2
    The weight capacity of the SumoSprings part # SSR-128-40-2 that you referenced is 3,000 lbs currently as it was recently uprated. Thank you for bringing that to our attention we'll get that updated ASAP. What's worth noting is that this kit will provide your factory suspension with 3,000 lbs more support to help it carry it's current weight capacity as safely as possible but does not give you additional capacity beyond what the truck is rated for.
    view full answer...
  • Comparing StableLoad and SumoSprings for a 2021 Ford F-250
    The TorkLift StableLoad Suspension Upgrade part # TLA7310S and SumoSprings Rebel Custom Helper Springs part # SSR-128-40-2 are both great options for a 2021 Ford F-250 that will help to reduce sag/squat while towing or hauling. They will both work together but that might be a bit overkill so I would just pick one, the SumoSprings are my recommendation.
    view full answer...
  • Can RoadActive Suspension Be Used on a 2019 Ford F-350 With Top Overload Springs?
    Due to the design of the RoadActive Suspension # RAS3611-SLHD you would have to remove the upper overload spring on your 2019 Ford F-350 to use their system. As an alternative if you wish to keep the top overload spring this will depend on if you have the 3" block between the leaf spring and the top overload spring. If you do have this block you will want to look at the SuperSprings SuperSway Stops # SS65GR. Otherwise the SumoSprings Rebel Custom Helper Springs # SSR-128-40-2 would be a...
    view full answer...
  • Recommended SumoSprings For 2021 Ford F-250 FX4 Towing 14000lb 5th Wheel Trailer
    For your 2021 Ford F-250 FX4 Crew Cab Short Bed with the 6.7L Turbo Diesel towing a 5th wheel weighing 14000lbs I recommend going with the SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle # SSR-128-40-2 you were looking at. The reason for this is they have a 3000lb rating which will be perfect for the pin weight of your trailer without being overly stiff, and will be a great maintenance free rear suspension enhancement option that is easy to install while being compatible...
    view full answer...
  • Best Suspension Enhancement for 2019 Ford F-350 that Won't be Too Harsh Unloaded
    For what you are looking for the best option is the SumoSprings part # SSR-128-40-2 for if you have a 2 wheel drive 2019 Ford F-350 part # SSR-129-40-2 for if you have a four wheel drive truck. This is the perfect blend of support and comfort that will be just what you are looking for. The Timbrens do have a reputation for being a bit harsh too so you'd really not like the unloaded ride quality if you went that route.
    view full answer...

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Used Items Available
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle

Condition: Installed

Notes: test fitted

$391.31
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Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
Used Picture for SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle

Condition: Installed

Notes: Item has been previously test fitted and has cosmetic install marks and scratches.

$438.06
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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Mary K
Written by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Alex H
Updated by:
Alex H
Employee Noah M
Updated by:
Noah M
Employee David F
Installed by:
David F

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