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  1. Vehicle Suspension
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  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Light Duty
SumoSprings Solo Custom Helper Springs - Rear Axle

SumoSprings Solo Custom Helper Springs - Rear Axle

Item # SS78DR
Retail:$360.45
Our Price: $289.99
You Save: $70.46
Vehicle Suspension

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1,800-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. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Solo Custom Helper Springs - Rear Axle part number SS78DR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension - SS78DR

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

1,800-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): 1,800 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-623-47 SuperSprings Sumo Springs Solo Rear Vehicle Suspension Kit for Trucks

Installation Details SS78DR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

SumoSprings Solo Custom Helper Springs - Rear Axle - SS78DR

Average Customer Rating:  4.7 out of 5 stars   (2171 Customer Reviews)

1,800-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.

by:
2019 Toyota 4Runner

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:
Toyota 4Runner

Easy to install.Did not have to remove the tires on my 2022 Toyota 4runner. Make sure you turn the plate and spring the right way.

Victor

9/2/2023

I pull a 19 foot ranger boat behind my 4runner and your Sumo Springs allow my 4runner to stay level and to handle safely. A must buy!



by:

These have helped out with the handling and avoided the harsh bottom outs. I frequently tow and these have helped provide a smoother ride and avoid the “hard” hit associated when going over bigger bumps etc.

Jason

12/15/2023

Solid performance from the SumoSprings! Greatly assist when towing and keeping from having too much sag and a harsh ride. Perform great off-road and allows bumps and hits to soak up nicely without a hard noticeable hit.



by: 06/10/2023

First time using them I was towing a 2500 pound trailer and the SumoSpring split in half. I requested a refund but they wouldn’t refund my money. They did send me a replacement pair. Which I was not confident in using the product after the failed spring so I sold them on marketplace. Don’t trust the product!



by:

I mounted them on my ‘07 Sequioa limited with air springs. They fit very well and work well as an additional overload spring. If the airbags lose air which happens when it’s very cold, it’ll sit on these sumosprings much better than the original bump stops which caused my bigger tires to rub. I’m very pleased with these.



by:
2021 Toyota 4Runner

I have always used airbags in the past and this is my 1st time using SumoSprings and I can say I will never go back to airbags! I run a heavy load on a 21’ 4Runner pulling a Teardrop with two motorcycles on stock suspension



by:

Quality product. Installation was smooth and easy with no issues. Over 10k miles on them towing a small tear drop trailer and they've aided the rear suspension significantly. No more droppy rear. Folks at etrailer are always available and happy to assist. A bookmarked retailer for sure!



by:
2018 Toyota 4Runner

Ride became too hard after installation on my 2018 4Runner. Instead I installed air bags that I deflate and brings back the original ride.



by:

After a year of use, these helper springs do all they were advertised to do. I maintain my OEM ride when lightly loaded, but also have the stability when loaded and pulling a trailer. One thing to be aware of, recently I was carrying a moderate load and riding on a very rough road. The ride was much firmer (and rough) than the OEM ride. This should be expected as the springs were doing what they were designed to do.



by:
2015 Toyota 4Runner

Easy to install. Really improved the ride on my Toyota 4 Runner. Less Sag when pulling my boat! Great product!



by:
2006 Toyota Sequoia

Worked perfectly on the truck, help with handling as well.



by:

It’s a great product, performs just as advertised.



by:
2010 Toyota FJ Cruiser

I'm 74 and had no problems installing the SumoSprings - with the right tools. The JF has not been lifted and I was still able to install the springs without removing the tire or jacking up the car. The parts fit perfect, and it took me about an hour using the right tools. I will not know how they work, pulling a offroad trailer / camper off-road because I do not go on road trips during the summer. I like the cold, so my trips are between November and April, depending on the weather. I'm sure that the backend will not drop like it's been doing with the new springs.



by:
2017 Lexus GX 460

2019 Lexus GX 460 Install these onto the vehicle the ride is completely smoother It made a huge difference definitely recommended Thank you etrailer.com



by:

Easy to install on your own and they do what they say they’ll do.



by:

Works as advertised!



by:

SumoSpings makes a great line of products! They make a world of difference when the rear is under load.



by:
2006 Toyota Land Cruiser

excellent. great improvement in trailering ride



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2023 Lexus GX 460



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Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Will 2004 Lexus LX 470 SumoSprings Affect Unloaded Ride Quality
    The SumoSprings Solo Custom Helper Springs # SS78DR won't affect the ride quality of your 2004 Lexus LX 470 when you aren't towing - this is one of the great things about the SumoSprings kits. SuperSprings says this kit is 11" tall so it depends on how much space you have between the mounting location and where this jounce spring makes contact with your vehicle. If you have 11" of space with the vehicle at the lowest setting then you'll be good to go. If it's less than 11" then you might...
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  • Recommended Rear Suspension Enhancement For 2022 Toyota 4Runner Towing 3,500lb Camper
    For your 2022 Toyota 4Runner I recommend going with the Sumo Springs Solo Custom Helper Springs # SS78DR. This option adds 1,800lbs of load leveling support to the rear suspension of your 4Runner and will be more than enough for your 3,500lb camper as your vehicle is only going to be carrying the tongue weight of the trailer which should be in the 350 - 500lb range. I really like the Sumo Springs due to them being made out of a softer rubber so that when you are not towing your ride quality...
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  • Recommended Suspension Enhancement For A 2020 Toyota 4Runner TRD
    For your 2022 Toyota 4Runner TRD I recommend the SumoSprings Solo Custom Helper Springs - Rear Axle # SS78DR. These sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway to give you a comfortable ride while towing a trailer, hauling items on a cargo carrier, etc. The springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns and are designed for progressive load...
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  • Suspension Enhancement for a 2022 Toyota 4Runner Pulling a Small Travel Trailer
    For your 2022 Toyota 4Runner I recommend the SumoSprings Solo Custom Helper Springs # SS78DR which are confirmed to fit all models of the 2022 Toyota 4Runner. These helper springs help support a heavy load to level your ride and minimize sway. They are made in the USA, have a no-drill installation and the springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns.
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  • Recommended Suspension Enhancement for 2018 Toyota 4Runner Towing a Boat
    Based on what you looked at and the 1,800 lb weight capacity you mentioned it sounds like you are talking about the SumoSprings Solo Custom Helper Springs - Rear Axle # SS78DR. Assuming that is the case, these actually do not require air lines so you will have no problem installing them. For your 2018 Toyota 4Runner the SumoSprings are definitely the way to go. The helper springs will help to keep your vehicle level when towing and absorb bumps and shocks. They work indepently to help...
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  • Recommended SumoSprings For 2023 Lexus GX460 Towing 19' Travel Trailer w/ 500lbs Tongue Weight
    For your 2023 Lexus GX460 that'll be towing a 19' travel trailer with around 500lbs of tongue weight I recommend going with the SumoSprings # SS78DR with an 1,800lb capacity. SumoSprings compress a bit before they really start to get stiffer as to not cause a super harsh ride, so I really recommend stepping up to this capacity instead of the lower 1,400lb capacity to make sure you're not getting excessive sag when you're hitched up.
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  • Comparing SumoSprings and Timbren Off-Road Bump Stops for 2023 Toyota 4Runner
    The Timbren Active Off-Road Bumpstops part # TABSTORSEQ which are a fit for a 2023 Toyota 4Runner are pretty similar to the SumoSprings Solo Custom Helper Springs like part # SS68DR. The Timbrens provide more support but the SumoSprings ride smoother. Therefore, it all comes down to preference and how you'll be using them. I personally prefer the SumoSprings as they offer the best of both worlds, ride quality and support. The only difference between the SumoSprings part # SS68DR and part...
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  • SumoSpring Kit Recommendation for Overlanding 2018 Toyota 4Runner
    Between the 1,400 lb SumoSprings Solo Custom Helper Springs # SS68DR and the 1,800 lb Kit # SS78DR I recommend going with the 1,800 lb kit. These won't affect your daily drive but will offer the support you need when you are going Overlanding. If you were only using your 2018 Toyota 4Runner as a daily driver I'd say stick with the 1,400 lb kit since there isn't really a need for the extra support.
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  • Best Suspension Enhancement For 2022 Toyota 4Runner
    The best option for suspension enhancement for your 2022 Toyota 4Runner are SumoSprings: - SumoSprings Solo Custom Helper Springs # SS68DR Th SumoSprings # SS68DR offer the best support for your '22 4Runner because they compress based on the amount of weight placed at the rear of your 4Runner. So when you are towing or otherwise have a heavy load in the cargo area of your Toyota, the SumoSprings will help level your ride, while reducing body roll and sway, giving you a smoother, more...
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  • Heavy Duty Suspension Enhancement Recommendation for a 2022 Toyota 4Runner 4X4
    The heaviest-duty suspension enhancement we have for your 2022 Toyota 4Runner 4x4 is the Timbren Kit # TTORSEQ. Timbren jounce-style springs like this are known for being able to help out with heavier loads, however they are also know to make the unloaded ride a little more rough so for your application I recommend using the SumoSprings # SS78DR as they aren't as unforgiving as the Timbrens. I think it goes without saying that you run the risk of damaging your 4Runner by moving around...
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  • Timbrens or SumoSprings For Towing Light Trailer With 2018 Toyota 4Runner
    For your 2018 Toyota 4Runner, between the 6,000 lb Timbren Rear Suspension Enhancement System # TTORSEQ and 1,800 lb SumoSprings Solo Custom Helper Springs # SS78DR, since your trailer is only 4,000 lbs you will not have a heavy tongue weight so I recommend the lighter capacity SumoSprings Solo Custom Helper Springs # SS78DR. The 1,800 lb rating for these is more than enough for a light 4,000 lb camper trailer, as the Timbrens would be overkill and can give a very stiff ride. The SumoSprings...
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  • Helper Spring Solution for 2021 Toyota 4Runner Towing 3700 lb Travel Trailer
    I wasn't able to determine the capacities of the OEM hitch on your 2021 Toyota 4Runner, the only references I could find was to the 500lb TW/5000lb towing capacity of the vehicle itself 'When Properly Equipped'. In the list of equipment needed to achieve that, the 'integrated towing hitch receiver' was mentioned, so it would be a very safe assumption that the hitch capacity would match that of the vehicle. With a loaded weight of 3700 lbs, the tongue weight would range from 370-555 lbs,...
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  • 2021 Toyota 4Runner SumoSprings Rear Suspension Enhancement
    Yes, the SumoSprings Solo Custom Helper Springs item # SS78DR work independently from each other to compensate for off-center loads and reduce body roll during turns. These will help your 2021 Toyota 4Runner stay level when towing as well.
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  • SumoSprings Solo Custom Helper Springs for a 2022 Lexus GX460
    The SumoSprings Solo Custom Helper Springs - Rear Axle item # SS78DR is going to be a far better choice for your 2022 Lexus GX 460. These are custom fit to your Lexus and are guaranteed to fit. You referenced the Air Lift 1000 Air Helper Springs for Coil Springs item # AL60732 these are a universal fit but aren't guaranteed to fit inside your Lexus's rear coil springs. The Sumo springs have a progressive load control that causes the springs to compress according to the weight of your trailer.
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  • Recommended Rear Suspension Enhancement For 2005 Toyota 4Runner Towing 2750lb Jayco Camper
    You are right on with my recommendation. For rear suspension enhancement for your 2005 Toyota 4Runner towing a single axle Jayco camper weighing around 2750 unloaded the SumoSprings # SS78DR is what I recommend. SumoSprings are a lot softer than other jounce style suspension enhancement so your unloaded ride will not be affected, but you will still get 1000lbs of load leveling support when towing your camper. These are also maintenance free where air helper springs can leak air and require...
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  • Suspension Enhancement Product for 2021 Toyota 4Runner Towing Travel Trailer
    Given the 400 lb tongue weight you'll be dealing with, the Timbren # TTORSEQ which has a 6000 lb capacity would be your best choice. That being said, I'd recommend the # SS78DR SumoSpring instead. The SumoSprings # SS78DR have an 1800 lb capacity which would be plenty for the 400 lb tongue weight of your travel trailer, and are constructed of a more pliable material which would provide you plenty of support and a better ride quality when the system is under load.
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  • Front Helper Springs for a 2022 Ford F-450 Chassis RV
    Yes, we do have front SumoSprings for your 2022 Ford F-450 RV Chassis. I recommend the SumoSprings Solo Custom Helper Springs item # SSF-111-54. These are our highest capacity helper springs. At 2,800 lbs these will help support heavy front-end loads to keep your RV level. These 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.
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  • 2015 Toyota 4Runner Helper Spring Recommendation for Heavy Bike Rack
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  • Recommended Way to Reduce Rear End Sag When Towing Lance 1575 Travel Trailer 2006 Toyota Sequoia
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  • Will the SumoSprings Solo Custom Helper Springs Work On a Lifted 2017 Toyota 4Runner
    The SumoSprings Solo Custom Helper Springs part # SS78DR are a great option for a 2017 Toyota 4Runner. They will be less effective if the vehicle is lifted unless you use a spacer. Unfortunately, SuperSprings does not make any sort of spacer for this but we do offer one that should work used on other similar systems, the Timbren 1" Spacer part # A25723-90AH00.
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    Based on the hitch on your 2008 Toyota 4Runner, and what the owner's manual says, you will have to use electronic sway control like the Tuson Asymmetric Sway Control # 335TSC-1000. This uses an algorithm to activate your trailer's electric brakes to correct sway. The main unit mounts on your trailer. Alternatively, you could install a different hitch like the Draw-Tite # 75155 which is compatible with weight distribution. Installation would require the removal of your old hitch and would...
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  • Spacer For Suspension Enhancement For Lifted 2015 Toyota 4Runner
    There is an option to add spacers to suspension enhancement for your lifted 2015 Toyota 4Runner, but not with SumoSprings. What you'll need to get are Timbrens, which replace your bump stops to offer the same type of added support as you're towing. So the correct fit for your '15 4Runner, as well as the available spacer options, are as follows: - Timbren Rear Suspension Enhancement System # TTORSEQ - Timbren 1" Spacer For Raised Frame Vehicles # TA25723-90AD00 - Timbren 1/2" Spacer For...
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  • Suspension Enhancement & Brake Controller Recommendations For 2006 Toyota 4Runner Towing Trailer
    We can get you everything you need for your 2006 Toyota 4Runner, and let's go ahead and start with the suspension enhancement, for which there are two options, the SumoSprings # SS78DR and Timbrens # TTORSEQ. Between these two, the better option for your 4Runner is going to be the SumoSprings: - SumoSprings Solo Custom Helper Springs # SS78DR The reason for that is they have a 1,800 lb capacity - which is going to be more than enough to help reduce the squat for a more controlled towing...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Alex H
Written by:
Alex H
Employee Aidan B
Test Fit:
Aidan B
Employee John S
Video by:
John S

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