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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 (1701 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.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 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 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.
To rough of a ride, had to take them off. Wish I had sent them back.
Thay fit perfectly and work great!
Been 1 year great product, works
Fits as advertised. Easy install. Easy transaction and a good company to do business with.
Great product.
missing some parts (2 off set plate) some far not good
Review from a similar SumoSprings Solo in Vehicle Suspension
First off, these won't fix worn out suspension components, they are designed to improve ride quality by reducing sag/porpoising, especially on heavier vehicles.
Our 2010 Roadtrek 210P (75k miles) is a great rv but essentially a big heavy tub going down the road. Has the tendency to lean and wallow front to back. New shocks and all suspension is good, as mentioned make sure that stuff is all in good shape.
Pics show the oem stops vs the SS stops. Big difference - you may assume ride gets harsh but not the case. The oem stops were very tired and didn't do much. The preload on the new SS stops is just about perfect - any weight changes are very progressive which takes the harshness out of the ride. I didn't really see any change to ride height either.
Road manners are improved, there's a bit more resistance to lean, but the main difference is that the front end doesn't try to change height as readily with the back end.
Not a big deal to install. Youbdont need to pull the wheels, just turn them side to side to get to the stops. Pop out the old stops and clean the retaining cups with a wire brush and some brake clean. I used syl-glyde on the new stops to help get them into place. I also used a crowbar under the stop to push it into the cup while making sure the 4 tabs captured the top of the stop. Final step was to lower the van and give it a drive, then check to ensure the fit was good. The key here is to clean the cup first and use a bit of lube on the new stop.
Very pleased and I'll be installing SS on the back end soon. Yup, they're pricey but they are good quality with a limited lifetime warranty.
Review from a similar SumoSprings Solo in Vehicle Suspension
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.
Review from a similar SumoSprings Solo in Vehicle Suspension
Parts arrived on schedule. At first I thought that the parts did not fit my truck, so I called customer service and they immediately started to send me a return label and refund. It turned out that I was wrong, and the parts did fit. I called them back cancelled the refund action.
Great friendly service!
I also found that the price I paid was much cheaper than [online store]. I highly recommend etrailer!
Review from a similar SumoSprings Solo in Vehicle Suspension
Very straight forward installation. Simple. very noticeable difference under load. Towing with the gooseneck also an improvement, looking forward to the longer road trip test. So far pleased with the product and results
Review from a similar SumoSprings Solo in Vehicle Suspension
I would have give it a 5star but the bolts are 1/4” I think it should be at least minimum of 3/8” or1/2” bolts to hold the sumo springs. I like them toed the camper handles very well. Wishi got these a long time ago worth getting. With out camper can tell that it’s there but rides ok. I wanted the same ride it not quite. I ask what the how high they are said 5” with bracket but it’s actually 6” with bracket see picture. I would recommend getting the sumo springs ssr-610-47.
Review from a similar SumoSprings Solo in Vehicle Suspension
Seems very robust. Looking forward to towing the trailer in the spring! Relatively easy to install, but thanks to a little [online] search, I was able to install them more easily. The steps for installation did not call for any lubrication of the top of the spring in order to get it into place, but it definitely needed it. I took multiple attempts to try and install them without and they simply wouldn't slip into place. I used a little bit of Simple Green in order to provide the lubrication that they needed to slip into place. It worked on the first attempt. OE bump-stops included in the picture next to the new Sumo Springs.
Review from a similar SumoSprings Solo in Vehicle Suspension
I had Sumo helper springs installed on my Winnebago Sprinter RV both front and back. It made an amazing difference! It no longer felt like riding in a Conestoga wagon…swaying side to side and bouncing everything to the floor. The ride is now smooth. Driving was easier. Turns are suddenly level instead of feeling like I might turn over. I could not be happier with these products! And it only took 20 minutes to install all four!
Review from a similar SumoSprings Solo in Vehicle Suspension
2015 Frontier Crew cab Desert Runner (purchased the yellow Sumo Springs). Easiest install ever! 18mm deep socket and long breaker bar for breaking nuts loose. Removed factory bumpstop, install sumo bracket and retighten U bolts to 58 foot pounds. After installing both brackets, lifted back of truck up 4 inches to install sumo spring with blue lock tight on bracket bolt, tighten sumo spring onto bracket and lowered truck off the jack. Overall it raised the back of my truck bed 1 inch. Ride is stiffer with no bed roll in the turns. Loaded my 24 foot travel trailer with load leveler- equalizer bars and gained 3 inches (less “squat”.) Truck is level now vs nose high (without the sumo springs). Definitely an upgrade that was needed in 2015 when I first bought the truck!!!
Review from a similar SumoSprings Solo in Vehicle Suspension
Took all but 15 minutes each side to install. Haven't hooked up trailer yet, but looking forward to see how it handles.
Review from a similar SumoSprings Solo in Vehicle Suspension
I wish I installed these earlier on my Ram Promaster converted into a camper van, the improvement in stability, feel and peace of mind. No longer blown around in high wind, better towing for my boat, firmer feel just driving normal. Hard to describe all the benefits but for how reasonable they are priced and ease of installation certainly wish I had these day one when I bought the van. 100% will install these again on future vehicles and would definitely recommend this to any and everyone
Review from a similar SumoSprings Solo in Vehicle Suspension
I gave the SumoSprings an initial rating of 4-stars because they do work as advertised. During the first thousand miles I've driven since installing them on my 2019 Toyota 4Runner, I have noticed they contact the rear axle much sooner than the OEM bumper stops which serves to quickly increase the suspension's resistance to any further downward motion of the truck's body - which not only dampens excessive rear end "dipping" on rough terrain, but also works well to prevent any appreciable rear end squatting from the tongue weight of my heavy 2-axle utility trailer.
I reduced my initial rating by one star because, while they centered on the mounting bracket holes in the same manner as the OEM bumper, I wasn't able to center the SumoSprings over the rear axle even after pushing them as far forward as the elongated bolt holes would allow.
Since the center of the SumoSpring pad (midway in the adjustment range of the elongated bolt holes) is in exact vertical alignment as the center of the OEM bumper, the only explanation would be that the 4Runner's coil-spring rear suspension has a slightly arced rear-axle "full travel" range as it rises upward from the lowest to highest position. If that "full travel arc" moves the axle to its rearmost position when the suspension is at full compression (where it contacts the OEM bumper), the "full travel arc" would then move the axle about 1/2" forward during the downward portion of the arc back to the normal ride position.
Therefore, since the surface of SumoSpring's long cushion pad is very close to the axle when it's in the normal ride position, that would explain why the SumoSpring at its farthest forward adjustment position is still about 1/4" to the rear of being centered on the axle(even though the SumoSpring in that position is now a bit further forward from vertical center of the OEM bumper).
However, since the rear axle's upward travel moves it slightly to the rear (and more toward center-mass of the SumoSpring's cushion pad), perhaps it won't suffer any premature deterioration or failure - but only time will tell about the SumoSpring's durability and longevity.
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