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When the back end starts to sag with a heavy trailer or bed load, these SumoSprings Rebel helper springs step in with up to 3,000 lbs of rear suspension support at 50-percent compression. The microcellular urethane springs help your factory suspension bear the weight more evenly so your ride stays level, steering feels steady, and braking stays consistent. With progressive load control, lighter loads compress softly for comfort while heavier ones firm up for solid support and reduced squat.
A rough road or an unloaded drive doesn’t have to feel harsh. The innovative 2-piece setup connects at the top and bottom when loaded but separates when unloaded, giving your suspension full movement and a smoother ride on uneven terrain. You get continuous stability when towing or hauling but comfort and flexibility when cruising empty or off-road.
Each spring works on its own side of the vehicle to keep things level even with off-center loads. That independent action cuts down on body roll in sharp turns and keeps your setup balanced during crosswinds or uneven approaches. The result is a more planted, predictable feel whether you’re cornering or pulling into a sloped driveway.
These springs are made from microcellular urethane that stands up to abrasion, oils, road salts, and UV rays. They operate from -25°F to 200°F and compress vertically with minimal side expansion, so nearby parts stay protected even in tight spaces. With no air lines or pressure to manage, they’re maintenance-free—just bolt them on and get consistent rear suspension support every time you haul or tow.
Customer Satisfaction Score:
88% were satisfied with this product
12% of customers were not satisfied
Ratings & Reviews
Claire H.
10/14/2026
Glad to hear it! I'm a big fan of SumoSprings because they're so easy to install and don't require any maintenance after. What kind of trailer are you hauling?
Rick
4/15/2026
The springs work great. After a year in service, they are like new. We use this truck as a rental equipment delivery truck. We pull a 26ft gooseneck tilt deck trailer that is 16K rated. The ride is great and the springs handle the load nicely with no sag when loaded. We have added these springs to all 6 of our 1-ton delivery trucks.
Katrina B.
5/23/2023
These will not fix an already sagging suspension. These are designed to help support suspension but leaf springs need to be replaced they will not fix that much sag. I would recommend using some airbags, like part # F2703, in place of Sumo Springs. You will need a compressor, like part # F2097 for the airbags.
Steve
5/16/2021
Outstanding!
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Jesse M.
9/10/2026
Hey Steve. Thanks for the feedback. This Rebel kit is designed for vehicles carrying variable heavy loads, so some contact at unloaded ride height can be normal depending on the application. If this is a dually, keep in mind this particular kit is intended for commercial applications only, where earlier engagement helps support the heavier loads these trucks regularly carry. I’d still verify the brackets and spacers match the instructions, but the Sumos contacting before the factory overloads does not automatically indicate a problem with this setup.