SumoSprings Solo Custom Helper Springs - Rear Axle
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2021 Jeep Grand Cherokee
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2021 Jeep Grand Cherokee
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Heavy loads can make the rear of your vehicle sag, throwing off steering and braking. These SumoSprings helper springs add up to 1,500 lbs of support at 50-percent compression to keep your ride level and stable when towing or hauling. The progressive microcellular urethane design smooths out bumps and cushions impacts so you maintain control and comfort under load.
You don’t need a harsh ride just because you’re set up for towing. SumoSprings compress easily under light loads for soft engagement and a comfortable ride, then stiffen as weight increases to prevent bottoming out. The progressive rate lets you tow or haul confidently while keeping the factory feel when your bed is empty.
When road curves, uneven loads, or crosswinds try to push you around, these springs work independently on each side to balance the weight. That helps reduce sway and body roll so your vehicle stays planted through turns or when approaching uneven ground. The result is steadier handling and a more controlled drive even with heavy cargo on board.
Once installed, there’s nothing to adjust or maintain. The closed-cell urethane construction resists oil, road salt, and UV rays while performing reliably from -25°F to 200°F. The springs compress vertically with minimal side expansion so they fit safely in tight spaces without rubbing nearby parts. You get consistent load support year after year without airlines, compressors, or upkeep.
Adding real suspension support doesn’t have to be complicated. These jounce-style helper springs replace the factory bump stops using existing mounting points—no drilling required. Everything fits where it should so you can upgrade your rear suspension with basic tools and get back on the road the same day.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Claire H.
7/6/2026
Your new SumoSprings look great! Thank you for the photo showing both the stock bump stop and SumoSpring, it's a great reference for others so they understand how it'll install.
Kevin
11/14/2023
Its working great. Leveled the truck and trailer perfectly.
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Andrew N.
10/21/2026
Hey John, thanks so much for the detailed response and photos. That really helps other folks on the page. I'm glad install went well and you're liking them! I have these sumosprings on my Nissan Titan and it's a huge upgrade for towing!