SumoSprings Solo Custom Helper Springs - Rear Axle
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2009 Sterling Bullet
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2009 Sterling Bullet
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When a heavy load makes the rear end sag, handling and braking can start to feel off. These SumoSprings Solo helper springs add up to 1,000 lbs of support at 50-percent compression to keep your ride level and steady. They help your factory suspension carry the weight so your headlights stay aimed right and your steering feels solid even when towing or hauling.
The microcellular urethane design compresses easily under light loads for smooth contact and a softer ride, then stiffens up as weight increases. That progressive action cushions bumps when the bed is empty and delivers firm support when it’s full, keeping comfort and control consistent no matter what you’re carrying.
Each spring works on its own to balance side-to-side weight differences and cut down on body roll in turns. That means better stability when cornering, backing into campsites, or driving through crosswinds—your vehicle stays balanced even if the load isn’t.
These durable microcellular urethane springs resist abrasion, oil, salt, and UV damage and perform in temperatures from -25 F to 200 F. They compress vertically with minimal side expansion so nothing gets in the way of moving parts. With no air lines or pressure to manage, they’re completely maintenance-free once installed.
The custom design fits securely with a no-drill installation using basic tools. Two jounce-style springs are included, giving you an easy upgrade that delivers lasting suspension support without complicated setup or upkeep.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Heather A.
8/12/2026
Wow thank you for the glowing review Randall. It sounds like once you got them installed they are working out great. That sunset is gorgeous, where were you in this photo?
Lazer S.
5/13/2026
Glad to hear the install wasn't too bad, Michael! Definitely let us know how the ride is once you take it out for a drive! What are you using your Van for? The tires look pretty beefy.
Gwendolyn Y.
5/20/2026
Looks like you were about to head off somewhere fun, Chad!
Christopher H.
8/4/2026
Happy to hear the # SSR-118-54 was a simple install and is working well for you. This is a great system!
Gwendolyn Y.
4/23/2026
Thanks for the awesome feedback, Jeff! Love hearing that the install was a breeze and that you noticed such a big difference in handling, that’s exactly what you want after the upgrade. Really appreciate you sharing the photos too, it’s always fun to see the comparison.
Gwendolyn Y.
1/8/2026
Glad the Sumos are helping make your loads easier to tow!
Richard
2/12/2026
No issues. Towed a 27 Airstream around 4k miles & its all good.
Lazer S.
2/12/2026
Mike
7/31/2025
The springs are working exactly as expect. I have need up to the mountains numerous times and to Monerary to the Sea Otter bike fest. They have reduced the body roll and helped keep the truck stable on the mountain roads or when loaded down for camping. Im very pleased I added these Sumo Springs to my Tacoma.
Jon G.
7/31/2025
Lazer S.
9/16/2025
Glad to hear they are helping, Cory! If you are feeling them going over speed bumps, I think taking one of the spacers out is a good idea. Especially if that is happening when you are unloaded. Speaking of which, what are you towing?
Lazer S.
9/23/2025
Albert
7/16/2025
Still working like new. So much better than the factory bump stop.
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!
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Claire H.
9/1/2026
That is the beauty of SumoSprings! Super easy to install and once they're on you can forget they're there! Are you planning on towing something with your Jeep that you want extra support for?