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SumoSprings Solo Custom Helper Springs - Rear Axle
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SuperSprings Intl

SumoSprings Solo Custom Helper Springs - Rear Axle

Part Number: SS95MR
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Vehicle Suspension

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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. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Solo Custom Helper Springs - Rear Axle part number SS95MR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension - SS95MR

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

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:

  • 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): 1,500 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-209-47 SuperSprings Sumo Springs Solo Rear Vehicle Suspension Kit for Trucks

Installation Details SS95MR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

SumoSprings Solo Custom Helper Springs - Rear Axle - SS95MR

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.

by:
2015 GMC Sierra

The springs are easy to install and have definitely improved stability on all load configurations. I have a 2015 GMC 1500 Sierra Denali 6.2L to pull a 7,500lbs camper that has a 750lbs tongue weight. With the coil springs I was able to reduce the trailer load distribution pressure which reduced down pressure and wear on the trucks front suspension. The coils also work great with all of my other trailers and load configurations. I would definitely buy this product again.
On a down side: the ride (when unloaded) from the coils is a bit rougher due to a shorter "unloaded" suspension travel on rough surfaces. Can't have everything hope this helps ;-)



by:

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.



by:

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.



by:
2008 GMC Sierra

Definitely helped ride hight with a trailer on



by:
2018 GMC Sierra 1500

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.



by:

Improved tongue load capacity as advised, but made ride without load a bit bouncy over very happy with performance



by:

To rough of a ride, had to take them off. Wish I had sent them back.

Jenny N. profile picture
Etrailer Expert

Jenny N.

4/25/2022

I will have the manufacturer reach out to you.



by:
2017 Chevrolet Silverado 1500

missing some parts (2 off set plate) some far not good

Brooke M. profile picture
Etrailer Expert

Brooke M.

9/2/2021

Thank you for bringing this to our attention. Our customer service team should be reaching out in the near future.



by:
2014 Chevrolet Silverado 1500

Fits as advertised. Easy install. Easy transaction and a good company to do business with.



by:

Thay fit perfectly and work great!



by:
2007 Chevrolet Silverado New Body

Great product.



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Been 1 year great product, works



by:
2014 Chevrolet Silverado 1500



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by:

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.



by:

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.



by:

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.



by:

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



by:

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".



by:

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.



by:

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.



by:

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.


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See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Comparing SumoSprings Solo Custom Helper Springs for a 2008 Chevy Silverado 1500
    There are three different SumoSprings Solo Custom Helper Spring options for a 2008 Chevrolet Silverado 1500. The difference is indeed weight capacity; part # SSR-209-40 for 1,000 lbs, part # SS95MR for 1,500 lbs, and part # SS45MR for 2,800 lbs. The part # SS95MR for 1,500 lbs would be a great option for your setup and what I recommend.
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  • Comparing Timbren, SumoSprings, and RoadActive System 2015 GMC Sierra 1500
    Between the SumoSprings and the Timbren kits for your 2015 GMC Sierra 1500 I'd go with the SumoSprings # SS95MR as the Timbrens are notoriously harsh when the truck is unloaded. That said the best option is the RoadActive Suspension kits like the part # RAS54FR for if you have a non-Denali or part # RAS2611 for if you do have a Denali with the Magneride. This gives you the support of the best systems out there while improving ride quality and stability so it's definitely the best option.
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  • Recommended Kit To Reduce Suspension Bounce Towing a 4,400LB Trailer With 2018 Chevy Silverado 1500
    For the bounce of the trailer the SumoSprings Trailer Helper Springs will greatly reduce the bounce as well as provide some added stability for the trailer. The Underslung Kit # TSS-106-40 will work if your axles sit on top of the leaf springs. The Overslung Kit # TSS-107-40 is the one you will need if the axle sits below the leaf springs. If the bounce you are experiencing is in your 2018 Chevrolet Silverado the SumoSprings Solo Custom Helper Springs # SS95MR are the ones I recommend....
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  • How To Fix Rough Ride with Timbrens On 2017 Chevrolet Silverado 1500
    The Timbren Rear Suspension Enhancement System part # TGMRCK15S is a great option to help reduce sag while towing with a 2017 Chevrolet Silverado 1500 but they do have a tendency to ride rough as the material is very dense. I think the perfect option for a compromise between support and comfort are the SumoSprings Solo Custom Helper Springs part # SS95MR. These ride much smoother than Timbrens and still provide support for towing or hauling.
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  • Which Sumo Spring Product for 2018 GMC 1500 Towing Up To 10,000 lbs
    Since the SumoSprings will be helping to support the trailer's tongue weight load, ideally you'll want to match the amount of support offered by the SumoSpring to the trailer's tongue weight. Since at most, the tongue weight of your dump trailer will be about 1500 lbs, worst case, I'd go with the 1500 lb capacity, part # SS95MR. When installed, the springs won't quite touch the rear truck axle, so they won't have any effect on your ride except when you're hauling items in the truck bed...
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  • Recommended SumoSprings for Hauling 1000 lb Round Hay Bales w/ 2007 Chevy Silverado 1500 Classic
    If a 1000 lb round bale is the heaviest thing you'll haul in the truck bed, I'd recommend going with the SumoSprings # SS95MR that you'd looked at, which would provide you a little bit of leeway in case the bales vary in weight a bit as the springs offer up to 1500 lbs of support per pair. If you'll occasionally haul items heavier than that, I'd go a step up in capacity with the # SS45MR which can support up to 2800 lbs. The SumoSpirngs are more pliable than other jounce spring replacements,...
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  • Will SumoSprings Help Reduce Rear Suspension Sag With Weight Distribution Kit
    Since the pre-load on the # SS95MR SumoSprings is typically about 1/2 to 1 inch, you'd very likely get some benefit from installing the SumoSprings. You shouldn't need to readjust the hitch. The first thing I'd recommend doing is revisiting the set-up procedure for your Fastway e2 to make sure you have the proper amount of tilt in the head. Typically, increasing the rearward tilt of the ball platform will place more downward force on the spring bars which would provide more lift. This...
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  • Will Sumosprings Work on a 2016 Silverado 1500 with a Leveling Kit?
    Leveling out the front end of your 2016 Chevrolet Silverado 1500 will have no effect on the function of the SumoSprings Solo Custom Helper Springs item # SS95MR. The SumoSprings aren't under pressure and ride unloaded on your truck when you're not hauling so clearance isn't an issue. I have included a picture of these Sumosprings.
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    Image 1 for
  • Correct SumoSpring Solo Helper Spring Fit for 2019 Chevy Silverado 1500
    For the 2019 model year, Chevy offered two different body styles for the 1500 Series Silverado, the Silverado 1500 (all new body style) and the Silverado 1500 Limited (old body style), which was mechanically and visually identical to the 2018 model. If you have the 1500 Limited, then the # SS95MR SumoSpring kit you'd looked at would indeed be a fit. If you have the all-new Silverado 1500, you'll want to use # SS45FR which offers 1500 lbs of support like the # SS95MR SumoSpring kit. The...
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  • Can Spacers be Used with SumoSprings Solo Custom Helper Springs on 2001 GMC Sierra 1500 LD
    The SumoSprings Solo Custom Helper Springs # SS95MR will be a total of 6" in height once fully installed on your 2001 GMC Sierra 1500 if you use the 1/2" spacer that is included. With the 7-1/4" clearance you measured there will a 1-1/4" gap. Your vehicle would need to sag 1-1/4" before the SumoSprings would start to engage. According to SuperSprings, no additional spacers can be used with these SumoSprings. Instead of the SumoSprings, I recommend the RoadActive Suspension Custom Leaf...
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  • Correct SumoSpring Kit for a 2016 Chevy Silverado 1500 with In-Bed Camper
    Hey Jim, good to hear from you again! I'm surprised to see the feedback on the 1.5K SumoSprings # SS95MR simply because people normally say that these have zero effect with the truck unloaded, but since that seems to be the general consensus I would agree that your best bet is to use the 1K SumoSprings # SSR-209-40 instead. Back when we first brought on the SumoSprings brand I got to talk with their owner and he said that their springs are constructed well enough that you can actually...
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  • Rough Ride with 2K SumoSprings on 2018 GMC Sierra 1500 Denali
    I do have some other options for you but adding suspension enhancements to a vehicle will more often than not decrease ride quality as they are designed to prevent sag and in order to do so you must increase firmness which leads to a rougher ride. Furthermore, there are very few options for a 2018 GMC Sierra 1500 Denali due to the MagneRide suspension. It looks like you went with the SumoSprings Custom Helper Springs part # SS29EV which are engaged all the time. If you're looking for an...
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  • Best SumoSprings for 2014 Chevy Silverado 1500 Towing 6,000 lb Travel Trailer
    For your 2014 Chevy Silverado 1500 towing a mid-sized, 6,000 lb travel trailer, the best SumoSprings for your application are going to be the 1,500 lb capacity SumoSprings Solo Custom Helper Springs # SS95MR. These will give you the right amount of compression so you get the best support possible without having a ride that would be too stiff like the higher-rated springs would give you.
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  • Troubleshooting Rear End Of Truck Bouncing When Towing Trailer W/ Fastway e2 Weight Distribution
    You should not be getting any bouncing in the rear of your 2018 Chevrolet Silverado 1500 when towing your 6000lb camper with 700lbs tongue weight with your Fastway e2 Weight Distribution Hitch. There are a few things I would check first before resorting to suspension enhancement. First what are the weight of the spring bars on your hitch? It is possible if you have an underrated system that it is not doing its job and causing the bouncing. Second I would go through and make sure the...
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  • Correct RoadActive Suspension Custom Leaf Spring Enhancement Kit for a 2017 GMC Sierra 1500 Denali
    The correct RoadActive Suspension Custom Leaf Spring Enhancement Kit for a 2017 GMC Sierra 1500 Denali is part # RAS2611. This is the kit that is designed specifically for Denali models with MagneRide. The kit when installed can lift the rear of the truck while unloaded but this will depend on which setting you use, the condition of the leaf springs, and which kits you're using but it's usually not much anyhow, around 1/2" - 1-1/2". The headlight level may be slightly off but this can be...
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    When considering increasing the towing capacity of your 2014 GMC Sierra 1500, there is something that you need to keep in mind. That is the fact that without serious upgrades to your engine and body, you cannot exceed the towing capacity of your hitch. However, it looks like the hitches made for your Sierra are rated for weight distribution systems. Using one of these can increase the load your vehicle can handle. For example, the Curt Class IV for your Sierra, part # C14006, has a tongue...
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  • SumoSprings or Timbren Kit for 2014 GMC Sierra 1500
    Between Timbren and SumoSprings I would go with the part # SS95MR that you went with. They provide a smoother ride quality when compared to the Timbrens which are known to be a bit harsh when unloaded.
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    Choosing the correct suspension enhancement system will depend on which 2011 Silverado you have and how the stock suspension is set up. A 2500 and 3500 Silverado will use the same systems, but the 1500 will be different, so here are a few options. For a 2011 Silverado 1500, the SumoSprings Solo Custom Helper Springs # SS95MR will be a set it and forget it type system, making it very easy to install and use. It will also have a weight capacity of 1,500 pounds at 50% compression but cannot...
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  • Which SumoSprings Fit A 2002 GMC Sierra 1500 Denali With Qudrasteer?
    I reached out to my contact at SuperSprings and the correct SumoSpring for your 2002 GMC Sierra 1500 Denali with Quadrasteer is the SumoSprings Solo Custom Helper Springs - Rear Axle # SS95MR. This will give you 1400lbs of load leveling support when you are towing or carrying a heavy payload and will not affect your unloaded ride like other suspension enhancement options. I included a video of the # SS95MR for you to take a look at.
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  • Suspension Enhancement for 2018 Chevy Silverado 1500 with 2 inch Lowering Kit
    Since shackle lowering kits lower the distance between the frame of the truck and the axle suspension enhancement fits are affected. So what you'd want instead is the SlamAir suspension kit part # AL59209 which fits your truck and with 2 inch lowering kits.
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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 Aidan B
Installed by:
Aidan B
Employee Joshua S
Video by:
Joshua S
Employee Jonathan Y
Video by:
Jonathan Y
Employee John S
Video by:
John S
Employee Evan R
Video by:
Evan R
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Shane H
Test Fit:
Shane H
Employee David F
Test Fit:
David F
Employee Ryan G
Test Fit:
Ryan G
Employee Kevin C
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