SumoSprings Solo Custom Helper Springs - Rear Axle
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2021 Ram 3500
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2021 Ram 3500
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Heavy trailers and bed loads can make the rear of your ride sag, throwing off your steering and braking. These SumoSprings Solo helper springs add up to 1,500 lbs of support at 50-percent compression to help level things out and keep the truck steady under load. They cushion bumps, absorb shocks, and share the weight with your factory suspension so the front tires stay planted on the road for better control and traction.
Whether you’re towing a camper or running empty, the springs adjust automatically to match the weight. Light loads compress the springs easily for a softer ride, while heavy loads engage more of the spring for firm support. This progressive design keeps small bumps comfortable and big hits under control without the harsh rebound that stiffer systems can cause.
Each spring works on its own side of the vehicle to handle uneven weight or off-center loads. When you round a turn or a crosswind pushes against you, this independent action helps reduce body roll and sway. That means steadier handling through curves, better balance when you’re loaded unevenly, and a more planted feel on the highway.
Made from durable microcellular urethane, these springs stand up to temperatures from -25 F to 200 F and resist damage from oils, road salts, and UV rays. They compress vertically with minimal side expansion so nearby parts stay safe even in tight spaces. Unlike air systems, they’re completely maintenance-free—no airlines, compressors, or pressure checks to worry about—and they install easily with no drilling required.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
missing some parts (2 off set plate) some far not good
Great product.
Fits as advertised. Easy install. Easy transaction and a good company to do business with.
Thay fit perfectly and work great!
Been 1 year great product, works
Improved tongue load capacity as advised, but made ride without load a bit bouncy over very happy with performance
Definitely helped ride hight with a trailer on
To rough of a ride, had to take them off. Wish I had sent them back.
Jenny N.
4/25/2022
I will have the manufacturer reach out to you.
A little price but a good product
Great service and good communication. Product was delivered as described and works well! Have not installed them yet but will update posting when I do.
The Sumo springs engaged to early. The dwell between the axle, and the sumo spring is only half an inch. So unless the sumo spring is fully engaged, the truck bounces significantly every time we hit a bump. I would reduce the overall length of assuming spring by at least a half inch to allow time for the shocks to engage.
The springs are easy to install and have definitely improved stability on all load configurations. I have a 2015 GMC 1500 Sierra Denali 6.2L to pull a 7,500lbs camper that has a 750lbs tongue weight. With the coil springs I was able to reduce the trailer load distribution pressure which reduced down pressure and wear on the trucks front suspension. The coils also work great with all of my other trailers and load configurations. I would definitely buy this product again.
On a down side: the ride (when unloaded) from the coils is a bit rougher due to a shorter "unloaded" suspension travel on rough surfaces. Can't have everything hope this helps ;-)
Just what I was looking for
This is one of the best upgrades ever. The sumo springs were like adding pillows to the back. Took out the bad body roll and rear shock chatter from the factory junk rancheros. On my Sierra 1500 2017 z71. Easiest install and upgrade spent on this truck.
The installation was a bit slower as this was a 2002 GMC Sierra 1500 and the bump stop did not have the bolt in the hollow opening. Instead, the bump stop and cup came off by removing a nut between the bracket and frame. Access to that bolt is more difficult but doable with an open end wrench. Then use the provided spacer and in my case one washer, and the provided nut and bolt to secure the spacer. The Sumo spring then simply screws on. Both fit very well leaving a gap between the spring and Axle. This installation was on a quadrasteer Denali. Very pleased with etrailer's written instructions (although a video for this vintage truck would have been great) and their delivery time.
Sorry to say but I do not like how thay worked.
I only kept them on for 3 weeks. With a trailer on it worked good. But without a trailer when you hit bumps there's no give and it's a very very rough ride.
A lot rougher ride then a 3/4 ton or even a one ton. So I took them off and will not use them again. I'll just get airbags for my pickup.
These helper springs work exactly as advertised. Easy to install and clear directions.
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Brooke M.
9/2/2021
Thank you for bringing this to our attention. Our customer service team should be reaching out in the near future.