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When you’re towing a heavy trailer or hauling a packed bed, the last thing you want is sag throwing off your braking and steering. These SumoSprings Rebel Custom Helper Springs add up to 3,000 lbs of support at 50-percent compression to keep your ride level and steady. The two-piece microcellular urethane design connects top and bottom to share the load with your factory suspension, keeping the rear end up and the front tires planted so handling stays predictable and safe.
Every load feels different, and these springs respond automatically. Light cargo compresses them softly for a smooth ride without harshness. Heavier loads push them up to 80 percent so they stiffen for extra support. The progressive action smooths out bumps and absorbs road vibration, keeping your ride comfortable whether you’re towing a camper, hauling tools, or just heading down a rough road unloaded.
Uneven cargo or sharp corners can make a truck lean and sway. Each of these springs works independently so one side can compress more than the other when weight shifts. That balance cuts down body roll in turns, steadies the truck in crosswinds, and keeps things level even with an off-center load.
These maintenance-free helper springs are made from microcellular urethane that resists oils, road salts, and UV rays while working in temperatures from -25°F to 200°F. They expand and compress vertically with minimal side movement, so they fit cleanly into tight suspension spaces and won’t rub nearby parts. There’s no air pressure to monitor or tubing to run—just solid suspension support ready whenever the load calls for it.
This kit includes two jounce-style springs with custom-fit brackets and hardware for an easy bolt-on installation. Once installed, there’s no maintenance needed—just reliable rear suspension support that keeps your truck level, stable, and ready for the next haul.
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!
Randy
5/22/2022
Product is excellent. The springs really reduced the squat I used to have in my truck when I hooked up my fifth wheel camper. Actual reduction in squat was around a 2 inch change. This also keeps the nose of the truck from rising in response to the rear sag I used to have, which makes the overall handling of the total rig a bit better as well. Also, the ride, while connected, is noticeably smoother and feels more stable while driving in stout crosswinds, which we frequently enjoy, here in Oklahoma.
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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.