To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
When towing or hauling heavy gear, rear-end sag can mess with steering, braking, and headlight aim. These SumoSprings helper springs add up to 1,400 lbs of support at 50-percent compression to keep your ride level and steady. They help your factory suspension handle the added weight so you keep control and comfort even when the load gets serious.
Every road throws something different at you, and these springs adapt to it. The microcellular urethane compresses easily at first for a softer ride when lightly loaded, then firms up as the weight increases. That progressive load control keeps the truck comfortable when empty and stable when fully loaded, cutting down bounce and harsh jolts over rough pavement.
When a curve or side wind tries to push you around, each spring works on its own to keep that side planted. This independent action helps reduce body roll and sway so the vehicle feels more stable through corners or uneven ground. It also helps even out off-center loads so you can tow or haul with more confidence.
These springs are made from microcellular urethane that resists abrasion, oil, salt, and UV damage. They hold up in temperatures from -25 F to 200 F and compress vertically instead of sideways, so they won’t get damaged by nearby parts. With no air lines or pressure to monitor, they’re completely maintenance-free once installed.
Getting better suspension support shouldn’t require a shop visit. These custom-fit SumoSprings bolt on easily with no drilling required. Two jounce-style springs come in the kit ready to mount, giving you a quick way to level out your ride and keep it stable under load without extra hardware or adjustments.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer.com. Let's take a real quick look at the SumoSprings rear-axle solo custom helper springs. Now, these have been designed to fit your 2008 to 2021 Toyota Land Cruiser and Lexus LX 570. And on custom-fit parts, such as these helper springs, I do recommend taking advantage of our "Vehicle Fit Guide" here at etrailer.com. Simply input the year, make and model of your vehicle, and our fit guide will confirm if these will work for you or if we have something comparable that will work for you.
Now, as you know, towing or hauling a heavy load can cause your rear to sag as your factory suspension compresses under the weight of that load. And this means that your 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 the front axle, your front tires may make less contact with the road, which is going to cause problems with traction, steering, braking. So these SumoSprings are going to help upgrade your vehicle's factory suspension to help level your vehicle, improving driving performance and keeping your ride more comfortable. These 1,400-pound-capacity helper springs are going to help provide progressive load support.
So the more that you load them, the stiffer they become. With the lighter load, the springs will compress easily for soft engagement and a less bumpy ride. The closed cell urethane material is going to allow for smooth contact between the springs and your vehicle. And the springs act like a shock absorber to dampen road vibration. Now, the springs can also compress by as much as 80% to support a rear heavy load and to help your factory suspension bear up under that load.
This means that it's going to even out the weight, which levels your vehicle and ensures that your front tires are making better contact with the road. So as you know, a level ride means that you have improved driving control. It's going to make sure that you have even safe headlight aim, it's gonna help minimize sway. And so these springs are going to help support your factory suspension, which is going to help prevent that sagging and reduce bottoming out. Now, these springs are gonna work independently from one another to support each side of your vehicle.
This action's gonna help reduce body roll when you make a sharp turn. This also helps compensate for off-center loads. These microcellular urethane springs are tough, they are going to resist abrasion, oil, salt and UV rays that can more quickly wear out other springs. And they're gonna perform well in temperatures ranging from negative 25 degrees all the way up to 200 degrees Fahrenheit. So SumoSprings compress vertically with minimum expansion to the sides. So what that means for you is they won't be damaged by nearby mechanical parts and they fit safely into tighter spots. And unlike air springs, these SumoSprings require no maintenance or adjustment. These jounce-style springs are made here in the USA and are custom designed for your vehicle. They're gonna install easily, no drilling required. As you can see, I do have them slightly, or loosely rather, put together. You're gonna get these two spacers, and then the two brackets that are going to fit your Land Cruiser or LX 570. I mentioned that the weight capacity is 1,400 pounds, so at 50% compression, 1,400 pounds, but SumoSprings do not actually increase your vehicle's weight carrying capacity, so you wanna make sure that you don't exceed your manufacturer's recommended weight limit. These do have a limited lifetime warranty from SumoSprings. And you will get an instruction sheet to guide you through the easy installation. Well, I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Ratings & Reviews
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.
Put them on this morning and took about 45-60 minutes. Driving without a trailer has little difference in stiffness so I’m happy about that. Then hooked up my two horse living quarters trailer and hauled about 30 miles to the roping. Roundabouts are so much better and the truck no longer feels tippy. Truck doesn’t squat near as bad. It rides great. Loaded is a little more stiffness as expected but not bone shattering. This was a great purchase!
Will continue to show confidence in eTrailer. Always Our first go to.
First and foremost, etrailer provided excellent customer service throughout my experience trying to find the right SuperSprings support spring for my 23 GMC Canyon AT4X. In a nut shell there is a “for Gas engine” option (SSR-624-40 / SS57PV) and “for Diesel engine” option (SSR-216-47 / SS75FR). In my opinion the “for Diesel engine” option (SSR-216-47 / SS75FR) fits better on the Gas AT4X. Following the descriptions, I initially purchased the “for gas model” (SSR-624-40 / SS57PV), but while test fitting I noticed a “pinky” sized gap between the provided ubolt and the bottom of the axle (as seen in image). The lower shock mounting plate appeared to be the cause of this, which I can only assume is different on the AT4X than it is on the other models (shocks are outboard on the AT4X, and inboard on other models). I reached out for some guidance and SuperSprings suggested there was no problem with the gap. However, while waiting for their reply I had already decided to give the “for Diesel engine” model (SSR-216-47 / SS75FR) a try, which directly replaces the factory bump stop using factory hardware (no need to use the included brake line spacer on my application). This eliminated the ubolt gaps, and any concerns I had about reliability. etrailer returned my original purchase without any hassle. Whether my concerns were valid or not, I hope this review will save some time for other AT4X owners.
Here’s my true thoughts of the blue sumo spring. Here’s the pro’s for me! Shipped and received the very next day, I got rid of the air bags that never held air. The sumo install was extremely quick. Hooked up to my food trailer and truck only went down about an inch and a quarter, much better than before! Sits about 1” off the axle so I still get a good ride, and loaded with a trailer… it still actually rode good. I’m tickled with them. Now.. the con and only con… I personally think $[XX] for two pieces of urethane and four brackets and two bolts is a horrible rip off!!! But…. LOL.. I’d buy them again!
2024 Z71 Silverado towing a travel trailer. Prior to these springs, the truck would bounce and sag. With the SumoSprings, truck is stable and sags less. Unloaded truck drives like factory. Easy install on my own.
Very easy installation. The improvement in handling is phenomenal.
The Sumo helper springs were not difficult to install (had to jack up the rear a few inches) & I really do think they have helped with steadiness in towing our camper.
Would recommend.
I have had these on my 2006 Colorado for a year, great product easy install I haul a compact tractor with bucket and tiller on a single axle trailer and the truck doesn't sag. No adverse ride quality when carrying no load definitely better than installing air shocks. Highly recommend to anyone having issues with vehicle sagging when loaded.
I’ve owned these SumoSprings for a year now and love them! I installed them on a 2016 Ram 1500 Crew Cab Outdoorsman 4x4. I tow a 7x14 aluminum cargo trailer that probably weighs 4000lbs loaded with gear. Before installing the SumoSprings my axles would almost touch my OEM bump stops and truck would sag. With SumoSprings my truck rides more evenly and is surprisingly smooth on the road. The ride quality is definitely better with SumoSprings. Less body roll in corners and an overall more confident ride. When I’m not towing I don’t even know they’re there. Awesome product!
If you want an affordable, indestructible suspension upgrade to eliminate rear sag and towing harshness—without the maintenance head-aches of air systems—the SumoSprings Solo sourced through etrailer.com is one of the smartest weekend upgrades you can make. The installation was easy and the install video they provide on YouTube is priceless.
Really solid for the money. Obviously if you plan to haul a load regularly you should upgrade springs or run bags, but these were a great temporary measure for hauling my bikes out west and back in my frontier. Easy to install and do the job well; particularly noticed the difference on rough dirt roads where in the past I would have been banging on the bump stops.
The Sumo Springs worked great in my 2022 Nissan Frontier and stopped the rear from sagging under trailer load but rode like normal unloaded. Very good product and very easy to install.
I was surprised at how much of a difference these actually make. I bought them based on some videos of others using them, but wasn't sure if they would actually make much difference in my situation. I tow a 6800lb trailer with a Silverado 1500. With the tongue weight of that trailer, the rear of the truck doesn't drop all that much and I wasn't sure if replacing the bump stops was even necessary, but when I'm on roads with "heaves" and especially bridges where porpoising can be a problem, these SumoSpring certainly help. You probably won't notice some huge drastic change, but it's just enough to matter and even out the ride to a noticeable degree. Also, they're pretty easy to install (and I'm only barely handy when it comes to this stuff.)
Great product! Bought these for my 2000 7.3 f250. Didn't want something that is constantly active like ras or hellwig since my leaf springs are new and rated for 4k pounds. Installed these in 1 hr super simple only hard part was the factory bump stop on driver side was a pain. Didn't install the puck they give due to height of truck and I knew more or less at what point I wanted them engaging. I haul cattle to shows/ auctions or between pastures with my 24ft big bend and these things actually provided a smoother ride in my truck loaded then unloaded.they do a great job with the added support and are better than an overload spring with handling sway and providing a smooth ride loaded. Just wish I could use the 3k pound rated ones on this truck and my dually but doesn't fit if you have a gooseneck sadly so will probably have to go with timbs on the drw. Over all great product can't speak to longevity but solid for the time being. And customer service with this company is excellent if you have a question or problem they're on top of it...hope they pay them as well as the reputation they're building for them.
I've never put on a easier product. I put the jack under the trailer hitch mount. Just lifted the body 1-2 inches and used a 12 mm socket . The socket removed the old ones and I hand tightened the new on. Literally took 10 minutes and a beer.
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.
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.
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