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SumoSprings Solo Custom Helper Springs - Front Axle
SuperSprings Intl

SumoSprings Solo Custom Helper Springs - Front Axle

Part Number: SS66RR
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Vehicle Suspension

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2,500-lb Capacity. Upgrade your vehicle's front 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. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Solo Custom Helper Springs - Front Axle part number SS66RR can be ordered online at or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension - SS66RR

  • Jounce-Style Springs
  • Front Axle Suspension Enhancement
  • SuperSprings Intl
  • Standard Duty

2,500-lb Capacity. Upgrade your vehicle's front 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.


  • Helper springs upgrade your vehicle's front suspension for improved driver control and comfort
    • Support heavy front-end loads to keep your vehicle level
    • Help to absorb bumps and shocks
    • Minimize sway
  • Progressive load control - springs compress according to the weight of your cargo
    • Lighter loads - springs compress easily at first for soft engagement and a less bumpy ride
    • Heavier loads - springs compress by as much as 80 percent for support
  • Springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns
  • Durable, high-density microcellular urethane
    • Works in temperatures from -25 F to 200 F
    • Resists damage caused by oils, road salts, and UV rays
  • Minimal lateral expansion - springs compress vertically instead of to the sides so they aren't easily damaged when operating in tight spaces
  • Maintenance-free - no tubing to run or air pressure to monitor like with air springs
  • Simple, no-drill installation
  • 2 Jounce-style springs included
  • Made in the USA


  • Weight capacity (at 50-percent compression): 2,500 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee

Front Suspension Support

A heavy front load, such as a snowplow or a winch, can cause front-end sag as your factory suspension compresses under the weight of the load. This means that the front 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 rear axle, your rear 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.

Installed spring when it is not compressed

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.

Installed spring when it is compressed

The springs can also compress by as much as 80 percent to support a heavy front 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 rear 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.

Durable, Custom-Fit Springs

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.

SSF-202-54 SuperSprings Sumo Springs Solo Front Vehicle Suspension Kit for Trucks and Vans

Installation Details SS66RR Installation instructions

This Product Fits The Following Vehicles

Video of SumoSprings Solo Custom Helper Springs - Front Axle

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for SumoSprings Solo Front Helper Springs Installation - 2012 Chevrolet Silverado

Hello, neighbors. It's Brad here at etrailer, and today, we are taking a look and installing the SumoSprings Solo Custom front helper springs on a 2012 Chevy Silverado. Now, when having suspension modifications done to a vehicle, it's generally not the first thing that people think to upgrade, unless you are dealing with a vehicle that's heavy, or sways, or is just a rough ride. And then after a few jostles, you finally decide it's time to upgrade. And sometimes with suspension things are worn out and you gotta replace shocks. And there's a lot of different components that can make for a better ride.

And one of the ones that I think is a nice, easy quick installation that's maintenance free, is gonna be these helper springs and what they do is they simply take out the original bump stops and these ones are going to be a much better padding. So reason being, it's a nice urethane construction and they're actually progressive Springs. So what that means is it's going to absorb that first little bit of bumpy ride as you're daily driving. But when you have that heavy load it's going to actually have a different compression ratio. So it's gonna tighten up and hold that heavy load with no problem.

Seeing that it's urethane, overall, weather, heat, cold whatever it may be. These are gonna hold up for a long time. And when you're driving, first turn you're gonna notice there's less sway. And these all are taller and wider than the original ones. And so you're getting a better contact patch.

You're getting more spring to actually compress. And so you're gonna feel that with every bump and every turn. Now, as far as bump stops or ground Springs as sometimes they're called, your bump stops in the front are there to really make sure that your suspension's not bottoming out but sometimes those bump stops really don't cut it much or the travel isn't really what you want it to be and it's gonna make that front end seem kind of just not supported and going to a heavier duty helper spring or SumoSprings like we'll be putting on here should really make a big difference as far as the front ride quality. Now we've just installed airbags in the rear on this and that's made a big difference, especially in a truck as weighted down as this one is. So as we go over these bumps here the front definitely, it's uh, you can feel the heft of this truck and that front hitting these speed bumps on our test course, there's a lot of bounce to that front.

So just hitting the speed bumps, there you go. One, two, you can kind of still feel it reverberate and overall it's uh, this suspension feels like it's overworked and it probably is for being a long life as a work truck. It's probably seen a lot of weight and it's seen a lot of rough roads. And I think having a little bit heavier duty helper Springs especially with a truck with this much equipment loaded should really make this a lot better when driving around normally and that's the glory of suspension mods, is it's one of those that you can feel every time you hop in the vehicle. Every time you drive, it's gonna be there and it's gonna be a huge difference in the vehicle. So I'm gonna kind of drive around our parking lot. I'll hit those bumps again, to kind of get a feel, and that way we can get a before of what it looks like and an after, and hopefully we'll see a difference in the way that the truck actually handles and we might be able to see it. But most of suspension is really one of those things that you're gonna feel while driving. It's, it's hard to quantify it per se but it's something that you feel with every bump, every turn, so it should really make a big difference and it shouldn't be too hard of an install as well. So now we have our front SumoSprings installed and let's see what they do. So I'm gonna kind of go through our parking lot here and make our way to our speed bumps, essentially our driving course, and that's really gonna simulate those bumps and uneven road and I think that's really where we're gonna see the difference that these make. Now when this truck first came in, was definitely loaded up with a lot of equipment and you could totally feel the weight and now he has rear air airbags and the SumoSprings in front. Now we tested the airbags and noticed quite a bit of difference, but I think this is really gonna be a huge upgrade in that front and already, it just seems a lot more poised. It's soaking up those bumps a little better than it was before. So now this is where it's gonna shine going back over those bumps. Oh wow. Much, much better. Before, it kind of rattled you around and you'd really hear that weight slapping around and while the rear helped, the front is really, really making a difference here. It just feels like it has. almost like having a car with blown front struts and then putting new ones on. It's a little more buttery smooth. It's definitely, definitely absorbing. Now, the install itself got to be a little bit tricky. It's not particularly hard, but sometimes to get those to compression pop in, can be a little tricky but I'm telling you it's worth it because for a pretty quick install, the difference that I'm noticing already, even just steering, is huge. Let's hit these bumps. Now before I was hitting them at about five miles per hour and this truck would really just rattle all over the place. It just jostled about and that weight was really throwing the truck wherever it wanted to be and now the truck seems like it can handle the weight. It doesn't seem like it's stressing out the suspension. And I think the neighbor who owns this vehicle is gonna be really happy and he's gonna notice it as soon as he leaves the parking lot here. I'm telling ya, the front, before it just kind of bounced around. This is a lot more supple. The dampening, it feels firm, but it's not bouncy. It really is just soaking this up so much better. So definitely a difference that I see while driving the truck. So if you've ever had adjustable suspension on a vehicle it's really nice to be able to have that dampening bumped up a little bit more, but can get expensive to have that adjustability. These ones, you put in place, and that progressive spring action really helps with the daily driving portion of it so you don't have to worry about softening it up. And when you need to go to a heavier load it's actually gonna compress in that progressive manner. So you don't have to adjust for it to be tighter. It's gonna be where you need it to be when you need it to be, and that's gonna help a lot with driving. So overall installation is pretty quick. You can do it at home. You're gonna need some jacks. You might need a pry bar, probably gonna need an extra set of hands. It's a little tricky. Getting them out, no problem. Getting them back in, you are kind of pressing them in and they kind of pop into place, but using the leverage of the vehicle, we've kind of found a way to get those installed. And we had it done pretty quickly. And so for a quick install and relatively good price it's really a suspension upgrade that you'll never have to worry about and it's always gonna be there every time you drive the vehicle. So let's take a look at that installation and let's get these installed on your truck. To begin our installation, you're gonna want to jack up the front of your truck. Now make sure that you have your emergency brake on and I would highly suggest chalking the rear wheels as well. That way it's not moving when you have it raised up. Also once you do jack it up, you're gonna wanna make sure you have jack stands in place. This is a heavy truck and I don't wanna rely just on the Jack to hold it up. And once it's raised up, you're gonna see here. They have a bump stomp. There's one in the front, and then there's also one right behind it back here. So before trying to pry these out, what I'm gonna do is I'm gonna take just a bit of heavy duty silicone spray here and I'm gonna just spray 'em up and that's gonna kind lubricate here and hopefully make it a little bit easier for these to pop out. So, go ahead, spray those in where they Mount. So I've sprayed these two. I'm gonna go ahead and do that on the other side. So now I'm gonna just, I'm gonna try to do this by hand and see if I can get any movement out of it. Sometimes a little twisting, to kind of unseat it, and pulling, will give you a little success, just like that. Pops out fairly easy. Now, if you are having issues, getting it out, putting a pry bar under there and just kind of working around the edge will make it a lot easier to pop out. But the fact that I was able to do that by hand is a really nice thing to see. So I'm gonna go ahead and I'm gonna remove the other three and then, we'll our new ones in place. So here we have our old bump stops and as you can see, they've seen kind of better days but even just side by side, with the new SumoSprings, you're gonna see not only is the SumoSpring taller, so it's actually going to grab that compression a little bit earlier, but it's also it seems a little bit softer and so hopefully that's gonna allow that weight to kind of compress more and having more body means that it's gonna be able to handle that weight a little bit better. Also looking at the diameter, that weight's gonna be able to disperse over a wider contact patch. So it should absorb quite a bit easier. So let's go ahead and get these in place. Now, these are really kind of tricky to get in as the diameter of the puck that actually pops into this cup is a little bit larger than the OEM. So we're able to get the other side in and really what it comes down to is we're going to use the weight of the vehicle to help kind of press this in and with some pry bars on the bottom, we're going to get it to where it's kind of seated and then really going back on the edge with the pry bar and kind of pushing that lip in that should get it popped into place. So I wanna show you how to get this one in. So here I have our large channel locks here holding on to it to kind of keep it squared up. I also have my pry bar here. The truck is raised up on this side. So being very careful, we're gonna try to lower it down in place and see if we can't get this to pop in. Going down. Just like that, a little pry with the pry bar on that motion, pops it in place. So we'll go ahead and do that on the other ones. Now it may be tricky. You may have to do it a few times, but once you get it seated like that, you're looking good. We're gonna go ahead and see if we can't use that same method to get this one in. So let's give it a shot. As you can see, I'm gonna have my pry bar under here and that's gonna give me that leverage upwards. There we're gonna go ahead and lower it down and once that kind of compresses I'm gonna give it a little upward pressure with my pry bar and it should pop into place. ReadyMmhmm. And I think we have success. So now we can raise this up, get our tools out and then take it for a spin. And that was a look and install of the SumoSprings Solo Custom front helper Springs on a 2012 Chevy Silverado. Thanks for watching..

Customer Satisfaction Score:

Customer Reviews

SumoSprings Solo Custom Helper Springs - Front Axle - SS66RR

Average Customer Rating:  4.7 out of 5 stars   (2367 Customer Reviews)

2,500-lb Capacity. Upgrade your vehicle's front 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.

2017 GMC Sierra 3500

Nice Product





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.


Very easy installation in about 20 minutes. Very ingenious concept as opposed to bolt on leaf style helper springs


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.


I originally purchased the yellow sumo for additional support when hauling a small trailer or taking trash to the dump so I wouldn’t strain the vehicles suspension that I just replaced . I also never like to see a truck squat . Yellows were too stiff when unloaded so I got these blues sumo and it was a great decision . The ride type is back to original “comfortable” and the sumo still provides great handling when cornering reducing body sway / shock absorbing bumps. A good investment !


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.


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.


These were shipped to me mid-trip so I had a good chance to do a before and after with same loads/ same roads for 3100 miles. They were easy to install (in my daughters driveway) in about an hour with one reluctant bolt in the original bump stop. I did not install the hard spacer, I figured I’d add it later if needed. I was able to do the install w/o jacking up the whole truck using a 1 1/2 ton jack under the hitch receiver w/ a jackstand next to it. I needed just a few inches as there’s lots of room under the stock height truck (I was lying on a piece of cardboard). The helper springs didn’t quite touch the axle when the jack was removed. When I first drove it in town with the Sumo’s on it they were not really noticeable. When loaded up with my 22’ Livin’ Lite Axxess trailer (4300lbs with 650lb hitch weight) the rear end would squish into the overload springs a good 3/4” but the truck was about level w/o rear end sag.
Driving home over many of the same roads I noticed it was better over railroad crossings and rhythmic bumps on the highway that previously pitched it fore and aft. The trucks manners were much better overall during big hits (like hitting a curb- yup) and pulling off-highway. The trailer is low so it doesn’t go very far off road so I can’t report on that.
Overall for ease of ordering, of install, simple usage w/o need of airlines and effective control of the rearend of the truck and the trailer I feel they deserve the 5 stars.


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.


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.


The SumoSprings Solo came to the RV Resort today. I installed them on my Titan SV today in less than an hour. Only drove 10 miles with them and they are what I was looking for. In my opinion it was a needed upgrade and thumbs up!


First, etrailer has always been awesome-unparalleled customer support and product selection. For the Sumo Springs, I’m conflicted on what to say. I think they work great. I have a Ram 1500 and I installed them to pull a larger travel trailer and they certainly took the sag out and leveled the truck. We did a trip from Maine around Lake Superior and they felt great.
The short story is that after some time probably 6 months they collapsed. That being said Sumo Springs was quick to replace them, but it was no fun reinstalling them. They blamed it on the cold weather, but hell, I live in Maine. We’ll see how this winter treats the new ones.


I have had these on my Jeep Gladiator for over a year now and I still like them. Sumo Springs really help with sag when towing my Scamp camper trailer and when the truck bed is loaded with stuff. When it is cold outside they are stiffer and I can feel when they hit the stops on hard bumps. Sumo Springs are a very easy overload spring option with factory lift.


Big difference in pulling the rv. I have about 545 lbs of Tongue weight.The sumo springs help with the swaying.Thanks again.


Works great on 2020 ford ranger. Left out the extra spacer because I don't want it riding on the leaf spring all the time. This gave it almost an inch clearance before the sumo touches and starts to help. That is what I wanted to not have it as stiff initially offroad, etc.


The Sumo Springs are probably the top purchase for my 5th wheel. Our ride is smooth and I believe it extends the life of my suspension. If you're going to RV full time, I would consider these a necessity. Put them on your RV and your truck. You'll be glad you did.


While these worked great for the first few months and helped level the load, they have now become deformed and squished out of shape permanently. We have a slide in camper that is on the truck for only for trips otherwise the truck is unloaded and off the bumps. I did not expect them to deform so much, and so easily after only a year of use.


Gotta little 2000 ranger 4x4 that pulls my home made 5x10 off road camper.Was squating and bouncing pretty bad with the 25 year old factory springs.Got these and put them on in about 30 minutes without even jacking it up. Dropped the spare tire for a little more room under there. Was the most worried about the 25 year old rusty bolts holding my bump stops on. I sprayed PB blaster on them a couple of days and no problem, if you don't count the ratchet slipping off and causing me to rip a chunk of meat out of my 71 year old arm. Don't worry, all my projects have some of my DNA on them.Everything went great after that, easy peasy. Before you tighten everything up, make sure the bumper mounting bolt is lined up with the vehicle bump pad or the new bumper won't hit the center. Just finished the install haven't pulled my trailer around yet. I'll do that after the first aid on my arm.LOL.


The Sumo Springs make the ride stiffer on rough asphalt roads. When the road is relatively smooth the ride is exceptable. They dont seem to handle the load like a air bag or progressive leafsprings but are working for my application right now.


Fairly simple to put on but need to work around the brake lines and bed cross beams. I haven’t tried it yet with weight. I have enclose pic of drivers side. Maybe can’t tell from the pic but there is space and flexibility around the lines around bolt.


We pull an off-road teardrop camper with our 2013 Toyota Tacoma and were looking for a little help with the rear end sag when we have that hitched plus putting some weight in the back of the truck (firewood, water, etc). Our Tacoma is lifted (2.5") but the lift kept the stock springs with an added Deaver leaf to help with the notoriously soft Toyota springs. However, with the shell and ~300 pounds of weight in the back, it still sagged, especially with another 250 lbs of tongue weight from the trailer. The Sumos have eliminated that sag, even with bigger loads in the bed, eliminated body roll (also notoriously bad with Tacomas) and didn't destroy the ride for day to day driving. There might be a slight bit more stiffness when hitting speed bumps, but definitely not bad at all. If anything, I would say it IMPROVED the ride and handling.

The springs themselves were simple to install, less than half an hour start to finish. Some reviews have said they were bumping the frame after installing but we had about 1/2" gap on both sides. The only "specialty" tool would be a torque wrench capable of 90 lbs to get it to spec.

We considered Firestone air bags but after talking with the reps at e-trailer, we decided on these and couldn't be happier. Reasonably priced (half the price of air bags), no maintenance, great customer service...can't argue with anything at all.

by: 01/31/2021

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!!!

Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

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Info for this part was:

Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Alex H
Written by:
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Employee Andy C
Installed by:
Andy C
Employee Bradley B
Test Fit:
Bradley B

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