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SumoSprings Solo Custom Helper Springs - Front Axle

SumoSprings Solo Custom Helper Springs - Front Axle

Item # SSF-280-47
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Vehicle Suspension

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Vehicle Suspension SSF-280-47 - Light Duty - SuperSprings
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1,500-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. Lowest Prices for the best vehicle suspension from SuperSprings. SumoSprings Solo Custom Helper Springs - Front Axle part number SSF-280-47 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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SuperSprings Vehicle Suspension - SSF-280-47

  • SuperSprings
  • Jounce-Style Springs
  • Front Axle Suspension Enhancement
  • Light Duty

1,500-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 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): 1,500 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 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-280-47 SuperSprings Sumo Springs Solo Front Vehicle Suspension Kit

Replaces SSF-280

Installation Details SSF-280-47 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 Custom Helper Springs Review

Speaker 1: Today, we'll be taking a look at the SumoSprings Solo Line of Custom Helper Springs for the rear axle. You'll want to use eTrailer's fit guide to determine the correct kit for your vehicle. This is what our SumoSprings look like when installed. Yours may look a little different depending on your vehicle.They're gonna replace our factory jounce stops and sit right between our frame and our rear axle. So whenever we're carrying a heavy load, they're gonna give us that extra support that we need. The way our SumoSprings are gonna work is when our suspension starts to sag from the heavy load, these are gonna absorb a lot of that weight.They are gonna work independently from each other so it's gonna help with those off-center loads.

Our springs are gonna have a progressive rate to 'em. So if we have a light load, they're gonna compress softly, still giving us that comfortable ride. But the heavier load we put on 'em, the more they're gonna compress and the more firmness they're gonna have to them.Now comparing to our factory jounce stop, you can see there's a big difference in height. These are gonna give us a lot more compression, whereas our factory jounce stops are really just preventing the axle from hitting the frame.We have a water tank at the bed of our truck as a heavy load or to simulate the tongue weight of a heavy trailer or a fifth wheel. So as I take the truck through my test course, I can definitely tell that there's a load back there.

The engine doesn't seem to be strained that much, but the bumps are extremely harsh and I can definitely feel it resonating through the seat.When I come to the slalom course and I'm going through the turns, it definitely has a lot of body roll and I just generally feel like I need to slow down because it feels likes it's leaning a lot and it's not responding quickly enough to the turns.Now that we have our SumoSprings installed and I have the same load back there, when I'm driving through our course, I can immediately tell a difference. It's much of a smoother ride. Going over the bumps really doesn't feel like anything's back there and it's just a lot more comfortable.When I come into the slalom course, it definitely feels a lot more stable and it doesn't seem to sway as much side to side and it just generally feels like it wants to go faster.These are made of a durable micro cellular urethane that works in temperatures from -25 degrees to 200 degrees Fahrenheit, and resists damage caused by oils, road salts and UV rays. Compared to air bags, these are maintenance free option with no tubes to run or air pressure to maintain. Both will help level your load and provide a smoother ride.

Airbags can be adjusted to suit your needs whereas the SumoSprings are a fixed option.That completes our look at the SumoSprings Solo Line of Custom Helper Springs for the rear axle.

Customer Reviews

SumoSprings Solo Custom Helper Springs - Front Axle - SSF-280-47

Average Customer Rating:  4.8 out of 5 stars   (542 Customer Reviews)

1,500-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.

- SSF-280-47

Helps reduce hard bumps and braking 900583

- SSF-280-47

Good customer service. Fast on receiving the springs 863057

- SSF-280-47
Holiday Rambler

Very happy with this products and what a great difference on my Holiday Rambler 2006 now i have to buy the rear one as well and the shipping was fast as well highly recommend this product and the dealer as well 831252

- SSF-280-47
2005 Workhorse W-Series

Finished installing somo springs and rear antiswaybar couple of days ago. Products seem to be of excellent quality and installation was relatively easy. Have not been able to get out on the road due to Covid-19 but hopefully will be able to travel in a couple of weeks. 800705

- SSF-280-47

Product arrive on time A+ 797765

- SSF-280-47

Noticeable improvement in the stability of the RV. I found the instruction difficult to follow, but got it done. No regrets 759132

- SSF-280-47

Installed on workhorse w22 . Helped on that sway on turns and harsh bumps. They work well. 718436

- SSF-280-47
2008 Workhorse W-Series

Ordering is always simple at etrailer.com with a very helpful product fit guide. Received product in about a week which fit my plans well. I installed the Sumo front springs and just finished a 200 mile trip from Southern CA to Central CA over our well funded and maintained highways....NOT! We have made this trip more than 20 times and this time we really noticed a difference in ride quality. I can’t wait to get the rear springs next. 661288

- SSF-280-47

One year and 8,000 mi since I installed the Sumo's on the front of my 34 ft Coachmen class A motorhome with a W-22 chassis. Still one of the best suspension modifications I have done to my coach. Great improvement on bridge joints and small pot holes. 654804

- SSF-280-47
2006 Workhorse W-Series

Adding the SumoSprings to the front of my W24 motorhome improved the ride over some of the worst roads I have seen in PA. and NY. 647067

The Sumo Springs on my W-24 chassis have given me a much softer ride during the last 10,000 miles. When you are sitting right over the front axle in a motorhome, you feel every bump in the road. Sumo Springs help smooth out those bumps.
Frank P - 05/31/2020


- SSF-280-47

Sumo springs helped the ride. 606977

- SSF-280-47

I installed a pair of these on my Newmar Kountry Star a year ago and I am really impressed with the improvement they made. After installation my motorhome is barely affected when I am passed by tractor trailers. Before the installation of the SumoSprings I was always fighting the wheel when I was being passed by large trucks. 278059

- SSR-209-40

Review from a similar SumoSprings Solo in Vehicle Suspension

Installed in 10 min. Easy install.Have not tried them yet.Boat is at the dealer.Will know when I pick it up. 692446

Tim - 08/23/2020


- SSR-117-47

Review from a similar SumoSprings Solo in Vehicle Suspension

Perfect fit and performs great. Help a lot on rear end sag. Great price and fast delivery. 680466

Still works great.
Hubert S - 08/05/2020


- SSR-338-54

Review from a similar SumoSprings Solo in Vehicle Suspension

Not only are the products sold by etrailer great quality but the prices and service can't be beat. One of the best places to shop online 759089

- SSF-106-47

Review from a similar SumoSprings Solo in Vehicle Suspension

Great product. Very easy to install. I installed Sumo springs front and rear on my class C Sprinter-based RV (Winnebago View) as part of a suspension upgrade to improve handling in cross winds. The other suspension upgrades included a Hellwig rear sway bar and Bilstein rear shocks. The handling improvement was dramatic. No more sway when being passed by semi’s and much, much better handling in cross winds. I am very happy with the Sumo springs. 656765

- SSR-207-47

Review from a similar SumoSprings Solo in Vehicle Suspension

Sumo springs really helps on heavy load situations & helps the ride as well. Easy to install, does everything the company said & what I expected it to do. Etrailer ,their staff with their expertise & knowledge of the products as well as with tutorials , pictures & videos makes me come back to purchase products that they distribute. 698298

Good so far. It does what I expected it to do, additional support for the heavy loads I’m carrying & not noticeable when unladen.
Arthur H - 09/07/2020


- SSR-610-54

Review from a similar SumoSprings Solo in Vehicle Suspension

I've had these for 1 year now for my 2016 Tundra and they are exactly what I needed!!! I couldn't be happier! Prior to purchasing and installing these, when I towed my 2 horses with my 2 horse slant bumper pull trailer, I was concerned about cargo weight in the bed of my truck so I was limited to gear I could bring camping and hunting season with my truck. Since adding these I can pull the horses and load my truck bed to the max including horse feed, hunting gear, coolers with food you name it and my truck doesn't even squat a bit! The ride is great with a load or without and my performance off road is still fine too! These proved to be a great solution to my needs and frankly better than pricey air bags. 673850

Were glad to hear that youre pleased with your purchase. Please keep in mind that the Sumo Springs product will not increase the capacity of your rear truck axle. The tongue weight of the trailer plus the weight of the cargo carried should not exceed the trucks rear axle capacity.
-- Mike L - 07/24/2019

Extremely satisfied with this product as gives me the ability to carry a heavier load with no impact to the ride of my truck including off road 4 wheeling!
Bob T - 07/23/2020


- SSR-130-54

Review from a similar SumoSprings Solo in Vehicle Suspension

SumoSprings really improved the ride on my 2018 Thor Axis 24.1 It is much easier to drive the twisty roads in the mountains with this product because the motorhome does not lean as much. 610794

- SSR-307-47

Review from a similar SumoSprings Solo in Vehicle Suspension

This product does what it says it will do. One of the issues that I have is the difficulty to install this product. The 2020 Ram 1500 on the passengers side has a stabilizing bar that interferes installing all the nuts on the rear of the mounting plate spring. My truck supposedly has a 1 inch lift from the factory (Big Horn North Edition). I used the plastic extension as recommended in the installation instructions and even with the 1 inch factory lift, using the plastic spacer makes the spring rest on the rear axle with no load in the truck. I'd recommend to not install with the plastic spacer. The ride is much stiffer but I'm OK with that as when my trailer is attached the ride is as expected. 764466

- SSR-307-47

Review from a similar SumoSprings Solo in Vehicle Suspension

I pull a 24 ft trailer w/ one slide out. It weighs roughly 5K (more loaded). My RAM 1500 is well balanced for the tongue weight and , of course, when not pulling, the truck drives as if the sumos were not there-which they are NOT when the weight comes off. I have noticeably more control overall. Glad to have purchased these. They were installed by Dodge dealership--no issues. A great product. 674123

- SSR-307-47

Review from a similar SumoSprings Solo in Vehicle Suspension

On a 2015 Ram 1500. The Sumo springs work great. I went from a loaded ride height of 35 inches to 36 1/4 inches. But the real improvement is in the ride. No longer have the squishy rear end wobble that I used to have. Combined with my weight distributing hitch my ride height improves to 37 1/2 inches. Truck is level along with my travel trailer. When I'm not loaded I don't even notice that I did anything. Still rides like factory. My only complaint is in the installation. Eight nuts with washers per spring and there is no space at all on multiple nuts to fit a so met or even a ratcheting wrench. Took about an hour in my driveway. Other than this minor inconvenience, I have to say excellent product. 347254

- SSR-307-47

Review from a similar SumoSprings Solo in Vehicle Suspension

The SuperSpring Solo work as advertised. They definitely help level the load when pulling my 27' camper. My only complaint is that they fit so tight (1/4" gap) between the bottom of the SuperSpring and the axle that as soon you load anything you are already using the SuperSpring. I would have preferred a little more of the oem suspension for day to day driving. 660605

- SSR-117-47

Review from a similar SumoSprings Solo in Vehicle Suspension

Went from air springs to these and much more happier with the ride and simplicity of these over the air bags. 735203

- SSR-329-47

Review from a similar SumoSprings Solo in Vehicle Suspension

Graeme product easy to install 717170

Love them installed both front and rear. Took about an hour maybe two. No regrets
Thomas - 10/15/2020

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Info for this part was:

Updated by:
Tricia G
Updated by:
Mary E
Updated by:
Noah M
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Chris R
Installed by:
Cole B
Video by:
Jonathan Y
Test Fit:
Robert C

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