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Heavy trailers, campers, or bed loads can make the rear sag and throw off your steering and braking. These SumoSprings Solo Custom Helper Springs add up to 1,500 lbs of support at 50-percent compression to help level your ride and improve traction when you’re hauling. They work with your factory suspension to keep weight balanced front to back so your truck stays stable and your headlights stay aimed where they should.
The progressive spring rate in these microcellular urethane springs means they compress easily for light loads and get stiffer as weight increases. That keeps the unloaded ride soft and comfortable while still giving solid support when you’re towing or hauling. You get cushioning over bumps and less bounce without the harsh, bottomed-out feel you get from rigid setups.
Each spring works on its own side to balance uneven loads and keep the truck steady through turns or crosswinds. By reducing body roll and sway, the springs help you stay confident on winding roads or when a gust from a passing semi hits. The result is smoother control and a planted feel even when the bed or trailer weight isn’t perfectly centered.
Unlike air systems that need compressors or pressure checks, these helper springs are completely maintenance-free. They install easily with no drilling required—no airlines to route or fittings to tighten. Once mounted, they compress vertically with minimal side expansion so they fit cleanly in tight spaces without risk of rubbing nearby components.
The closed-cell urethane material holds up through oil, salt, and UV exposure while performing in temperatures from -25°F to 200°F. That means dependable suspension support whether you’re driving through winter slush or summer heat. The solid construction gives lasting stability and support trip after trip without sagging or leaking.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
I bought and installed the 1000lb Sumo Solo springs to help alleviate rear end squat on my 2024 GMC Canyon Denali when pulling my boat. My boat trailer has a long mono tongue with no weight distribution installed. The boat weighs in at about 5500lbs, the truck fender lip measures 38” high unloaded, once I dropped the hitch down on the ball and the Sumos picked up the load, the fenders measured 36.25” equating to an inch and 3/4 squat. Empty the Sumos have an apx gap of 7/8” above the frame rails. The Sumos were recommended over the Timbrens for my situation of infrequent towing with this truck and to maintain the best ride possible when not towing. So far my ride is virtually unchanged when empty and feels controlled when towing. Installation is straight forward but the instructions could be a little clearer with a diagram showing the intended location of the springs. Luckily an etrailer customer had already done the install and provided some pics so there was no question. I chose to remove the tires to have good access and I’d do it again this way. I supported the truck with a jack stand under the receiver. IMHO the proper method to locate the over frame upper clamp brackets is to push the forward clamp as far forward until it contacts the bed stiffener and you’ll be in the correct location then let all the hardware hang to position itself, tighten as required and enjoy.
Installed these right before a long road trip, and were impressed with how much the ride improved. Opted not to include the spacers, which has worked out fine. While not towing have not noticed any change to the ride, which is good. When towing the steering has a solid grip on the road now (sometimes felt a little loose before installing these) and no more issues with 'porpoising'. We drove across a several mile long bridge in the Bay Area that likely would have been a roller coaster ride previously, and had no issues. Quick and easy to install.
Put these on a Jeep Gladiator to haul a motorcycle to Sturgis. Kept everything level, good ride and stability. Highly recommend.
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.
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.
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.
Great product and delivery
Easy to install and does what I want it to do
Easy to install.
Huge noticeable difference even in factory size
Super easy install and work well.
Third Titan that I put these on. Great support and ride. Easy installation.
Highly recommend
Install was ease. No problems at all. At first I didn't know which springs would work so I sent a text to support and they helped me out. Excellent service got my springs 2 days early also.
Excellent !! Install took about a half hour and took a test drive with my trailer attached, and a noticeable difference, no noticeable sag on my truck and felt very secure.
And etrailer was very fast to ship, ordered Monday and was here by Thursday! Thanks again for another great product and fast shipping
The sumo springs we easy to install. I would recommend that you include removing both rear tires, it makes the installation so much easier. It can all be done sitting on your mechanics roll around seat.
Springs where easy to put on didn't take long at all haven't towed trailer yet they are way beefier than what was on my Nissan I would recommend them if you tow
Great quality product andfast delivery.
One of several purchases from etrailer and all have been positive. The Springs got here today as promised and were what I ordered. Jacked the Titan up one side at a time, secured it with jack , brakes, jack stand. Removed tire and removed the old stop. installed the new sumo springs that were somewhat larger than the oem and reinstalled the tire etc. Did the other side and was done in about 30 minutes. Looking for great service from this product and see no problem. Just what I was looking for. Thanks etrailer!
So far so good. I am pleased with the way they have leveled off my truck. It was an easy install. I didn’t even have to remove the tire to get them on. It was a simple lift of the frame.
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Bryan
11/2/2022
Sumo springs helped handle the weight of my camp trailer, I would recommend them for a Nissan owner