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Towing or hauling makes your rear suspension work hard. These SumoSprings Solo helper springs add up to 900 lbs of rear axle support at 50-percent compression to keep your ride level and controlled. They help your factory suspension handle extra weight so your steering, braking, and headlight aim stay steady even when the back end is loaded down.
Every bump and dip doesn’t have to rattle the whole rig. The microcellular urethane springs compress easily with lighter loads for a softer, less bumpy ride, then firm up as weight increases to support heavy cargo. That progressive load control keeps things comfortable when empty and solid when loaded—no harshness or bounce either way.
Sharp turns or uneven loads can make the rear feel loose. These springs work independently to balance each side, cutting down on sway and body roll. The result is a more planted, controlled feel whether you’re carving through curves, pulling out of a driveway, or dealing with uneven trailer weight.
Made from durable microcellular urethane, the springs resist oils, road salts, and UV damage while working in temperatures from -25 F to 200 F. They compress vertically with minimal side expansion so nearby components stay protected in tight spaces. With no air lines or pressure to monitor, the setup is completely maintenance-free once installed.
Getting extra suspension support doesn’t have to be complicated. The custom-fit jounce-style springs replace the factory bump stops and mount using existing points—no drilling required. Once in place, they’re ready to handle bumps, sway, and heavy loads without any ongoing adjustment.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Paul
11/30/2019
The rig handles much better with the Sumo Springs , particularly on city streets. It corners sharply without the massive body roll and turning into sloped driveways , the rolling is greatly reduced. Very happy I added these to my Sprinter Chassis.
Mike L.
11/2/2018
We are glad to hear that the new SumoSprings you purchased are working well for you. Please keep in mind that suspension enhancement products like these are intended for use on suspension systems that are in good working order.
Brooke M.
3/26/2025
With how it handles now, I bet that is both literal and figurative :)
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Peter M.
10/5/2020
Review still stands as written one year ago!