SumoSprings Solo Custom Helper Springs - Rear Axle
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2016 Ram 3500
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2016 Ram 3500
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When trailers or heavy gear weigh down the back end, steering and braking can start to feel unpredictable. These SumoSprings Solo helper springs add up to 2,800 lbs of rear suspension support at 50-percent compression to keep your ride level and steady. They cushion bumps, help your factory suspension handle the weight, and keep your headlights aimed where they should so you stay in control even with a full load.
A light haul or a heavy trailer shouldn’t feel the same, and these springs know the difference. Their progressive load control lets them compress easily for softer engagement on lighter loads and firm up as weight increases. That means less bounce when empty and solid stability when fully loaded, all with smooth contact that feels more like a shock absorber than a jarring bump stop.
When a curve or uneven load pushes one side lower than the other, each SumoSpring works on its own to keep things balanced. This independent action helps cut down on body roll and sway so your vehicle stays planted through turns, crosswinds, or uneven driveways. The result is a more controlled, predictable ride whether you’re towing or hauling gear.
These high-density microcellular urethane springs hold up through oil, road salt, and UV exposure that can break down other materials. They perform in temperatures from -25 F to 200 F and compress vertically with minimal side expansion so nearby parts stay protected even in tight spaces. With no air lines or pressure to monitor, they’re completely maintenance-free once installed.
Getting better load support doesn’t have to mean tearing into your suspension system. These helper springs are custom-fit and bolt on with no drilling required. Once installed, you’ve got reliable rear suspension support that’s always ready—no adjustments or maintenance needed before your next tow or haul.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Put these on a Jeep Gladiator to haul a motorcycle to Sturgis. Kept everything level, good ride and stability. Highly recommend.
I had installed this model SumoSpring on my 2019 4Runner and had great results when towing the camper I had at the time. They greatly reduce the bounce when going over dips in the road at highway speeds. Now I have a 2021 Titan and a bigger heavier camper. I expect the same great results on the Titan. Installation was pretty straight forward and took about a half hour. The size difference between the OEM bump stops and the SumoSprings alone should give a better ride when towing my camper.
Product is great, exceeded my expectations. Install is simple and straightforward. It’s a night and day difference in both the body roll and the handling small bumps all the way up to off-road conditions.
Love them! The truck barely even squatted, had two dirt bikes, and a generator in the bed as well! It handles the bumps and sway great
I got the springs installed last week and wanted to have a drive time before I wrote the review.
The height of the springs are perfect for my 2016 Tacoma, They keep the truck stable and nearly eliminate the body roll I had before installing them. I am heading to the mountains in a couple weeks, so I will update the review when I get back. That way I will know for sure the body roll is gone and the truck is stable on the winding mountain roads.
The springs installed in no time at all and since I had the rear end apart, I decided to add the leveling blocks at the same time, to keep the truck from squatting with the gear I haul around with me.
The guys at etrailer are great. And while I did not call them to discuss this item, they have been very helpful in the past with all my questions.
Below are pictures of before, a couple comparisons and after. Sorry if they come out sideways.
These Sumo Springs were a great addition to my Tacoma and well worth the money, IMHO.
Opted for the Blue 1000lb Sumo's w/spacer over the 1500lb Black ones. 1500 Silverado Max Tow & reduces squatting by 2" on a 1000lb+ tongue weight. Ride is still good, but you can feel the Sumo's engage over large dips or bumps which is not an issue for me.
2025 Promaster 2500 159” wheelbase. Backed the van on couple 2” X 6 “ easier sliding under. Sprayed PB Blaster on top of bumper spring, using a 16” Channel Lock, easy off with the old. At that time I jacked the rear end to allow clearance. One side at a time. Took longer for set up then the job. I used the long bolt with two spacers. Have not drove yet, though looking for great results.
I put these on a 2013 Jeep JK (not lifted) that tows a 3000 lb trailer in rough terrain; Total game changer.
These replaced the anemic factory stops (which had completely disintegrated) and make it impossible to 'bottom out' on the dips and holes that use to beat up the suspension. I got nearly all of my vertical travel back and the vehicle now sits almost level under high tongue load.
They go on pretty easy. I suggest sliding in one side, and then using a wooden dowel and hammer to pop the other side in the stock receiver cup.
Highly recommended. These are a MUST if you are towing a trailer (with a medium sized SUV) of any significant weight or if you just want to be able to bounce hard without bottoming out your suspension. I am likely going to get the front suspension version now as well.
Wish I knew these existed sooner.
Stable and smooth ride.
Work great, truly help RV roll…
I received the item one and a half hour prior to darkness. I was able to put them on (with [online] help) and drive around the area just prior to darkness. Great ride and noticeable comfort change. I applied the fronts about three months ago. Transaction was smooth and flawless.
They worked pretty good but have settled kinda. The load use to level now it's not quite level.
Excellent customer service as always!
These Sumo springs are just what I needed to keep my RV from rolling so much around corners and in wind. I would have given it 5 stars but the 4 1/2" bolts were not long enough to go through the frame and use the 1" spacer blocks.
(1) Great customer service - quick response times and more than happy to help
(2) Fantastic product - It irritates me that these aren't standard on motorhomes; what a difference from the stock springs!
Finished installing today, so far so go od.
Perfect transaction. Very fast order processing and arrival. Great communication.
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