1. Vehicle Suspension
  2. SuperSprings Intl
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Standard Duty
SumoSprings Solo Custom Helper Springs - Rear Axle

SumoSprings Solo Custom Helper Springs - Rear Axle

Item # SS45MR
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Our Price: $265.99
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2,800-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. Lowest Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Solo Custom Helper Springs - Rear Axle part number SS45MR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (1097)
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SuperSprings Intl Vehicle Suspension - SS45MR

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

2,800-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:

  • Helper springs upgrade your vehicle's rear suspension for improved driver control and comfort
    • Keep your vehicle level when you're towing or hauling a heavy load
    • 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 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


Specs:

  • Weight capacity (at 50-percent compression): 2,800 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee


Rear Suspension Support

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.


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 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.


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.



SSR-209-54 SuperSprings Sumo Springs Solo Rear Vehicle Suspension Kit for Trucks

Installation Details SS45MR Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

SumoSprings Solo Custom Helper Springs - Rear Axle - SS45MR

Average Customer Rating:  4.7 out of 5 stars   (1095 Customer Reviews)

2,800-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.

- SS45MR
by:
2015 GMC Sierra 1500

Installed them today but, haven't put a load on them yet. Drove around with them and am excited to get my trailer hooked up. They are no joke. I will be pulling almost 9500 lbs with my gmc 1500. The truck does great the handling needed some help.



- SS45MR
by:
2012 Chevrolet Silverado

I put these on my 2012 Silverado 1500. With my heavy trailers, I was having problems with bouncing and stability. These fixed all of my issues. The truck drives great, even pulling my boat and trailer which are close to 6,000 pounds. The best part is that they don't effect the ride for daily driving.



- SS45MR
by:

I have a 2020 Silverado 1500 that I tow a 30 foot long 6500 pound dry travel trailer with. The stock suspension was a little soft and bouncy which made towing a bit of a white knuckle ride. I ordered the SumoSprings in hopes of helping this and I must say I think they did the trick. The install wasn't as straight forward though as the supplied spacers were not thick enough to properly space the plate that holds the spring far enough off the frame to clear the factory welded cup. Lucky for me I work at a machine shop so I turned a couple of new spacers out of aluminum the proper thickness which in my case was .700 thick compared to the supplied 1/2 inch thick. In order to use the supplied spacers I would have to rotate the mounting plate into the opening of the welded cup which put the springs in the wrong location. After all is said and done I towed with it this weekend and it was night and day. Extremely happy with the ride now and if it weren't for those spacers I would have given 5 stars. The truck still rides close to factory unloaded which is what I wanted and the springs really only come into play when the camper is attached. Nice product otherwise!



- SS45MR
by:



- SS45MR
by:



- SSR-612-47
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


Couldn’t have been a simpler install! Total time was less than 15 minutes which included digging the floor jack out, blocking the tires and cleanup. Makes a heck of a difference in keeping the nose of the truck up when towing trailer or hauling 16 golf cart batteries.


Comments
Still awesome. A year later, have hauled up to 16 golf cart batteries with no issues due to the weight. A real help in getting the work done without the fear of bottoming out.
EV T - 08/19/2021


- SSR-610-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


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.


Comments
One year and working better than I imagined it would. Carrying loads in my Tacoma is no longer an exercise in fear and my shocks are way happier happier with a little help!
Barry - 08/07/2021


- SSF-106-47
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


We love our Sumos. They are easy to install and they helped with our sway and jouncing. Unfortunately, we just added a new rear suspension package which lifted the rear about 2 inches. Now the Sumos don’t touch the axle and won’t provide much sway damping. They act now more like a very fancy jounce bumper. Still good to know that the rear Sumos will give us extra protection should we hit a wicked pothole. Front sumos still snug against the axle and helping with sway and crosswinds



- SSR-114-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


Not driven under load, but think it is the answer. I may have to remove the spacer. I had to have them installed, not as easy /smooth as their video portrays. The instructions do not advise as what it suppose to look like (for F350 SRW) . IE: barely touching the axel? Above the axle? The 2800 load was recommended, I will follow up after my RV trip. I want it to set level, but not ride stiff W/O a load.


Comments
You are going to want at least 1 inch of space between the bottom of the spring and the axle otherwise it will create a rough ride. I do recommend removing the spacer.
-- Etrailer Expert Sierra K - 09/30/2021


- SSR-130-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


I found these springs while researching a towing question. I was more than impressed with portrayal of part, adequate info and glowing reviews. I was further delighted by speed of arrival and impressed with branding of the packaging. Top notch. Front and back installed in about an hour. Instructions are clear. I did find it easier to pre-assemble the stop to the bracket in order to determine if I was going to use the spacer or not. (I did). Note on this RV chassis, the bracket mount stud had to also clear an additional harness bracket. There was adequate threads for locknut



- SSR-207-47
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


Good piece of gear, works great supporting my new grand design 5th wheel. Installing was easy, only information I can pass is the 2x4 was not enough to seat the spring, had to add another 1/2 piece of wood to help seat the spring inside the cup..


Comments
Great, after 1 year the spring is still doing its job. No issues no complaints
George W - 04/09/2021


- SSR-209-40
by: 05/25/2021

Review from a similar SumoSprings Solo in Vehicle Suspension


2018 silverado z71 crew cab 6'6 bed Replaced air bags with 1000# sumo springs. Do a lot of offroading and bags limited travel. With these I can use my suspension and stay level on the trip with all my gear. Nicer ride unloaded and even sweeter when loaded. Easy 40 min install if you're use to working on your own stuff. A definite upgrade.



- SSR-610-47
by:

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.



- SSR-307-47
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


took about 45 mins to a hour to install mostly because of bolt up other wise probably 30 min install if bolt up was not in such a tight location. I did leave out the spacers which left me with about a 1 inch gap where as I had about 3 before install with OEM bump stops. I have not loaded a trailer on my truck yet but I did load around a 1000lb bail of hay right after install into the bed and you could not really see a drop in the back. Moment of truth will be when I load my travel travel which is the main reason I bought these due to sag. 2014 Ram 1500 4x4



- SSF-106-47
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


I found these springs while researching a towing question. I was more than impressed with portrayal of part, adequate info and glowing reviews. I was further delighted by speed of arrival and impressed with branding of the packaging. Top notch. Front and back installed in about an hour. Instructions are clear. Took me more time to figure the socket size for removing the E-450 OEM front stops.



- SSR-313-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


Pretty easy install on a Winnebago Solis, built on the Ram Promaster 3500 chassis, took about an hour to install on all 4 wheels. I only parked on a level surface and used the factory jack, didn’t even lift the van off the ground all the way but enough for clearance to install, no tire removal done. I gained about an inch of clearance which is nice for my onboard generator and hoping for a better ride on windy days. The pictures are before and after of (in order) front, rear, size difference of Sumo vs. oem and the generator.



- SSR-114-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


So managing a travel nurse's life we tow all over the country.. The Sumo spring has helped tremendously with ride level and stability for tens of thousands of miles in this first year.. With no hassle of leaky air hoses or blown bags along your ride it is by far one of the easiest ways to help support your load!!!!



- SS95MR
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


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.



- SSF-106-47
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


Love the product fairly easy to install. Took just about two hours for all four Sumosprings. The front was a bit more challenging and I’ve seen somewhere else about using a plastic bag that you can cut up and inserted in the 13 mm deep socket, this will keep the nut in place while threading. Your videos are very helpful and strongly suggest that you create a how too for the front replacement


Comments
Love them. Highly recommend both front and rear. Easy to install
Thomas - 10/15/2020


- SSR-312-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


This is my second set of SumoSprings. The first set was on a 2020 Ram Rebel. They fit perfectly on that truck with no space between the spring and the axle. They were much more difficult to install on the Rebel. This set was much easier to install. When I ordered the springs the reviews were split on whether there would be a space between the spring and the axle. I made sure to order the correct pair for my 2021 Ram 2500. New truck for the larger trailer I’m now towing. I received the package very quickly and was surprised at how small the box was. I opened it to find the springs and all the parts in the shipping box along with the pictured instructions. I was slightly perturbed that it appeared to be a return but the parts and springs looked new so I proceeded to install. I placed the setup next to the bracket and realized there would be a space between spring and axle so I called etrailer to check if I was missing a spacer. I also was a bit worried that I ordered the wrong set since the instructions only say 2014-2017 and not 2021. I was told it was designed that way so I decided to give it a try given my experience with the Rebel and installed the springs per the instructions. Took less than 30 minutes total. I used the provided loctite on the set screw and spring. I then drove around a bit and unloaded there is no change to the rear suspension. Going over larger bumps you can tell when the spring begins to engage as there is a little rebound. I then hooked up my trailer. With 815 lbs tongue weight the springs are engaged on the axle and with my WD bars engaged the truck is back to stock rake per the zero longitude angle with the 4x4 page pulled up. I haven’t towed yet but expect it to be similar to my Rebel and I was very satisfied with that performance. I recommend them for your your truck. Especially if you have a Ram.



- SSR-307-40
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


These went on in an hour. They took the stress off the equalizer bars and made installation and removal of the bars much easier.


Comments
They work as promised. They’ve solve issues with towing the trailer.
Michael - 07/20/2021


- SSR-610-54
by: 01/31/2021

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!!!



- SSR-312-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


I just finished installing the Sumo Springs to my 2020 Ram 3500. The install was super easy. Instruction were easy to follow and the whole thing took less time than I thought. I won’t know how they perform until I pull the 5er out of storage this spring, but I am ready. My only question and the reason for 4 stars instead of 5 was I thought they would sit closer to the axle than they did, may 2” from axle and I would have liked may 1” maybe I could have used another spacer and longer flat head screw to bring it closer but we will see when I put the weight on the truck. I included picks if someone wants to give me their opinion. So far I am really happy with them.



- SSR-130-54
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


Front & Rear Sumo Springs Just installed the Sumo Springs I ordered and oh WOW!!!!! That is the finishing touches to my suspension on my 32 ft Class C on an E450 chassis and love the results. Bought our coach a year ago and installed Hellwig sway bars ( front & Rear ) Bilstien shocks and Safe T Plus Steering control and that made a huge difference to drivability but then decided to add Sumo Springs, Oh My Goodness with all that I’ve done our coach drive down the highways and byways rock solid. The sumos weren’t to difficult to install considering this ole man has had 3 back surgeries and 2 bad knees but we got it done and I was blown away on the test drive. I highly recommend the Sumo products.


Comments
Still love the Sumos, they do their job. Class C is so much more a pleasure t drive even in wind and large semi trucks passing by, barely a wiggle. I would highly recommend these on any motorhome
Joseph - 05/13/2020


- SSR-117-47
by:

Review from a similar SumoSprings Solo in Vehicle Suspension


This solved the problem of the my 2016 F150 sagging when I have my work trailer hooked up. They lifted the rear of my truck up 2 3/8 inch from what it was. Funny thing is, its only 3/4 inch from the factory height. Now I will say I can tell a difference in the ride being alot stiffer when the trailer is connected. The difference when not using the trailer is just a little more stiff. I did use the spacers. I also complained to the staff at etrailer because of the stupid shipping times. I originally purchased the springs on 8/27/21 and according to the website, I was supposed to receive them by 8/31/21. Well that didn't happen. I even called and complained, but the blame was on the USPS. I didn't receive them until 9/7/21. The arrival date was the same on the free shipping as with the paid shipping according to the website, but they are wrong about that.


Comments
I apologize about the slow wait for your items. I do show that it shipped on 827 and it did go US mail. If you need your item faster next time, I would not go with the free shipping.
-- Etrailer Expert Sierra K - 09/20/2021

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Alex H
Written by:
Alex H

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