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1,500-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.
Features:
Specs:
Towing or hauling a heavy load can cause rear sag as your factory suspension compresses under the weight of the load. This means that the rear axle is trying to support not only the extra load but also the weight of your vehicle. And because there is less weight on your front axle, your front tires make less contact with the road, which causes problems with traction, steering, and braking. SumoSprings upgrade your vehicle's factory suspension to level your vehicle, improve driving performance, and keep your ride comfortable.
SumoSprings provide progressive load control - the more you load them, the stiffer they become. With a lighter load, the springs will compress easily for soft engagement and a less bumpy ride. The closed-cell urethane material allows for smooth contact between the springs and your vehicle. And the springs act like a shock absorber to dampen road vibration.
The springs can also compress by as much as 80 percent to support a heavy rear load and to help your factory suspension bear up under the load. This evens out the weight, which levels your vehicle and ensures that your front tires are making better contact with the road. A level ride means that you have improved driving control, ensures safe headlight aim, and helps to minimize sway. The springs also support your factory suspension, which helps prevent sagging and reduces bottoming out.
The springs work independently from one another to support each side of your vehicle. This action helps to reduce body roll when you make a sharp turn. This also helps compensate for an off-center load.
These microcellular urethane springs are tough. They resist abrasion, oil, salt, and UV rays that can more quickly wear out other springs, and they perform well in temperatures ranging from -25 F to 200 F (-33 C to 93 C).
SumoSprings compress vertically with minimum expansion to the sides, so they won't be damaged by nearby mechanical parts and they fit safely into tighter spots. And unlike air springs, SumoSprings require no maintenance or adjustment.
The helper springs are custom designed to fit your vehicle, and they install easily - no drilling required.
Average Customer Rating: 4.7 out of 5 stars (2495 Customer Reviews)
1,500-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.
I installed the Sumo Springs , front and back, on my 2022 Promaster van before I started my camper conversion. Sumo springs are alimony a must on a build to reduce sway and assist with the constant load in the back of the van. I purchased them from etrailer because of their outstanding customer service
Sumo Black part no. SSR-313-47, 1500lb @50% compression. Installed on Ram ProMaster 3500 RV conversion van. Approximately 85% of the swaying has been eliminated but still retained the soft to firm ride.
Our brand new 2021 Promaster 2500 high roof 159 felt a bit tippy and drove sloppy when we had it at highway speeds in significant wind, or when on significantly off-camber roads. It just wasn't comfortable to drive or ride in, so we asked around and everyone's answer to the problem was SumoSprings. Bought from etrailer at a great price, had them installed by a pro. Now we're telling everyone the same thing – these springs make the van ride like super stable SUV and driving the van is a pleasure instead of work. Couldn't be happier.
Solved an issue regarding a part broken in shipping right away no issues!
product is good as always and etrailer is superb in assisting customers. 5 stars.......
Excellent product and service!
I can't review product yet since I just received and won't be installing for a couple more weeks. I purchased based on reviews of others that have installed and high ly recommend. I am giving 5 stars to e trailer based on excellent customer service would definitely buy from them again
Installed on 2500 Dodge Promaster van after taking out one leaf. I drove in heavy cross winds and bumpy construction areas and it worked great. In my case they are just making contact when the van is average loaded.
A ride with reduced bounce and sway when couple with coil spring suspension rings.
I do feel this springs helped smooth out the ride of my Winnebago Trend.
Great and fast service
These Sumo Springs were easy to install, even for a 70 year old guy. I tow a 7,000lb camper and even tho I have a nice WDH I still had som sag on my Tundra. These helped level it out when towing and got rid of “some” of the bounce. They were really a godsend when I overloaded the bed with about 2,000lbs of pavers. That weight squished the Sumos significantly but the truck drove and rode great. Better and less expensive than air bags.
I installed Sumo Springs on our 06 Xterra right after we bought our Casita 17' trailer. The back of the X squatted a bit more than I liked. I had also noticed before some tendency to bottom out if the car was full of people and stuff. These ingenious devices are a perfect solution for me! They are about 3/4" clear of being engaged with the axle when unloaded, so the ride is not overly affected, but progressively take up some of the weight when the back end starts coming down with load. It now sits very nicely with the trailer connected, no weight distributing hitch and stuff in the back, and no more bottoming. We've put a good number of miles on the X in the last year, towing and not towing, and they are still doing the job.
I should note, the back of my Xterra is lifted about an inch with AAL springs. If that were not the case, the Sumo Springs would be engaged all the time. That will vary with vehicle.
I will also note that they are non-adjustable, unlike airbags. I kinda like that, I didn't want to mess with adjusting air pressure and such. But once they do start kicking in as one or both wheels travel, they do stiffen it up quite a bit. I mean, there's no way around that; you can't take load without stiffening the suspension. As such I think they inhibit upward axle articulation a bit when 4-wheeling, but for us that's not a big deal. Since they do not connect to the axle, they don't affect downward articulation at all.
The pics are shortly after installation, one with the car unloaded, and two with trailer and gear loaded up.
I believe it’s going to be a great addition to my truck when pulling our RV. Looking forward to a smoother, more even ride. I left the 2x4 blocks in overnig8ht and drove around to ensure a good seat for the springs.
Very easy installation in about 20 minutes. Very ingenious concept as opposed to bolt on leaf style helper springs
I installed the black Sumo Springs on a 2019 Toyota 4Runner. The fit was easy. Passenger side could be done without jacking the vehicle (although many folks on Youtube said they could not make the install and tighten). I used zip-ties to tie the brake sensor lines away from the pinch points. The Sumo springs are a great option. I tow a 3200# travel-trailer. The Sumos reduced sag at the hitch from 3-inches to one inch, and the wider contact points with the axle clearly provide more stability. I am 4000-miles into an out and back cross country camping trip. The ride while towing is tighter and gives more confidence. Glad I chose these over "air bags".
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.
Gave it 5 because of ease of install - note they use SAE threads 9/16, truck frame and oem is metric 15mm wrench. Makes no difference but don't use oem nuts on spring. I installed all shims supplied and this left about 3/4" gap so hoing its the best for my needs. Easy to reduce if needed.
Towed my 12k fifth wheel with my '23 super duty once before purchasing these. Night and day difference! The springs reduced the side to side sway and wallowy ride. My initial tow it felt more like a bumper pull than fifth wheel, now back to feeling very stable. The truck still squats pretty good but not as much.
I used the Sumo spring with the RAS system. I remove the pump stops and installed the sumo(without spacer) so the axle would be one inch from sumo so the RAS does the work when not pulling trailer and sumo sumos are activated with pulling the camper. The stability it created on highway and back winding roads was really great. Feels like a totally different truck when loaded up. The RAS came with an offset spacer to move the bump stop in a better place but I didn’t need it because the bracket with the sumo springs moved the unit back and in and had plenty of clearance for the RAC system. In total they only took15 minutes each side to install once the truck was up and the tires were off. The sumo spring and RAS together were amazing and would recommend them to anyone with an F150 that need a little more support near the bumper.
The parts are made with what appears to be a powder coat paint job.They all came packaged nicely and well protected. The instructions are clear, accurate and easy to follow. Mentioning that there is a left and a right assembly may be helpful to some. Mentioning "outboard" may be ovelooked by some. They installed easily. Removing the wheel gives you plenty of room for easy access. Once installed with my 4runner on the ground, the SumoSprings were resting on the frame. I do have a dog kennel and lots of training equipment that is loaded constantly. Hopefully these will help when I pull my RV. I did take it for a drive and it felt "firmer" more stable around sharp curves. I like them.
This is the second pair if SumoSprings I have bought. The first pair of springs were Great coming my truck level with support trailering a 26 ft RV. My first truck was totaled last October by a bad driver.
I just bought enough pair SumoSpring in another truck to haul and support a big weight.
Thanks,
Bruce Forejt
Installation was relatively easy and straightforward. I haven't noticed a huge difference in ride quality yet but I haven't towed anything since installing them. I will edit my review as soon as I am able to put the sumo springs under a heavier load or find the time to get off road.
I waited until I could drive the MH to rate this purchase. They were super easy to install. This difference was subtle but noticeable. Less body roll in corners and in windy conditions. This also resulted in better steering and a more relaxed drive. Well worth it!
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George H.
5/5/2019
The application to my motorhome has improved the handling tremendously. I am extremely happy with the product and etrailer. I will always be the etrailers loyal customer.