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SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung

SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung

Item # SS26MV
Our Price: $274.99
You Save: $69.29
Trailer Leaf Spring Suspension
This item qualifies for Free Shipping
Shipping Weight: 6 lbs
In Stock
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Product Expert Kathleen M

Is this right for you? Product Expert Kathleen M says:

Yes, if you:

  • Find yourself swaying and rolling when going over driveways or areas with gusting winds
  • Have limited tools and/or experience with making modifications to your trailer
  • Have an overslung axle, which means the leaf springs sit on top of it

No, if you:

  • Have issues with your wheels bouncing after hitting bumps and need something to control that rebound
Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride. Great Prices for the best trailer leaf spring suspension from SuperSprings Intl. SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung part number SS26MV can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (91)
  • Q & A (0)
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  • Why etrailer?

SuperSprings Intl Trailer Leaf Spring Suspension - SS26MV

  • Boat Trailer
  • Camper
  • Car Hauler
  • Snowmobile Trailer
  • Utility Trailer
  • Leaf Spring Enhancement System
  • 5000 lbs
  • 6000 lbs
  • 7000 lbs
  • 8000 lbs
  • Single Axle
  • Jounce Springs
  • SuperSprings Intl

Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride.


  • Improves suspension, handling and safety
  • Provides additional support as needed so you always have a smooth, comfortable ride
  • Allows the leaf spring ample movement while cushioning light loads
  • Becomes more rigid as more weight is added
    • Increases stability, providing great performance while hauling heavy loads
    • Raises trailer ride height
  • Works independently side-to-side
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
    • Works to eliminate trailer sway
  • Acts as shock absorbers, taking the brunt of bumps and rough roads
    • Reduces load on leaf spring assembly
    • Extends the life of your trailer's suspension
  • Designed to work with a suspension system that is in good working order
  • 2 Jounce-style springs, line relocation bracket, mounting brackets and hardware are included
    • Maintenance-free - no tubing to run or air pressure to monitor like with air springs
    • Simple, no-drill installation
  • Made in the USA


  • Application: 5,000-lb to 8,000-lb single, overslung axle - springs sit over axle
    • For tandem axle applications, use 2 kits
  • Capacity: 900 lbs at 50 percent compression
    • Do not exceed the trailer's weight-carrying capacity
  • Spring dimensions: 5" tall x 4" diameter
    • Compresses up to 65 percent of original height with full memory rebound
  • Required clearance between top of spring plate and bottom of trailer frame: 5-5/16" - 6-1/2"
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee

Note: Does not work with spring plates wider than 4-1/4".

TSS-107-47 Sumo Springs 5,000 lbs - 8,000 lbs GAWR Trailer Helper Springs w/ Bracket - Overslung

Installation Details SS26MV Installation instructions

Customer Satisfaction Score:

Customer Reviews

SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung - SS26MV

Average Customer Rating:  4.6 out of 5 stars   (91 Customer Reviews)

Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride.


etrailer provides quality products you can trust. Sumo springs made a big difference in the ride quality of my fifth wheel going down the road. It helped with chucking and takes some of the roughness out of the roads. Items in the cupboards are still a mess when we get to our destination, but less of a mess. Highly recommend!!


I have had the Sumo Springs for over a year. At first I did not like them because they made the trailer ride too rough. I could tell after a trip because the inside storage items were all messed up. I read on etrailer web site that you could "cut" the Sumo Springs to fit, which is just what I did. I measured the distance from the bottom of the frame to the top of the Sumo Spring bracket, then cut the springs using a hack saw to fit. I cut approximately 2 to 3 inches off each spring. After doing that about 6 months ago I noticed a huge improvement. The 5th wheel does not sway side to side when going around corners or with crosswinds, it is much more stable now. I have not broken any more spring leaf's, and the ride is much improved because the inside storage items are not messed up at the end of the trip. I would recommend these for any trailer or 5th wheel.


Installed on 2022 Jayco NorthPoint 310RLTS. Took them on their maiden voyage east on 138, south on 15 and 215 into Santee Lakes, Ca. Appears they have mitigated some of the rebound caused by springs, however don't expect it to eliminate all. There was still at times significant "bouncing" when transitioning bridge gaps or wonderful LA / San Bernardino Freeways.

Having had Timbren springs on my last truck and really enjoying the support, wondering now if I should have gone with them?

Bottom line, they WORK, just less than I would of expected. But then again, my expectations might have been too high.


So far so good. Easy install. Used trailer jacks to give me the 1/2-1” of lift required to install these. Definitely feel the difference in stability/lean when going around corners and hitting bumps. Will be putting a few thousand miles on this summer and these will provide some peace of mind knowing the suspension system isn’t taking as bad of a beating. A little pricey for rubber springs especially since I need four, but sometimes peace of mind comes at a price.


We have a Grand Design Reflection 5th wheel with the refridgerator on the rear wall, and we kept having issues with the fridge doors coming open during bumpy travel, so we installed the Sumo Springs based on a number of other reviews that indicated it would restrict the trailers bouncing. Total success, we have not had the doors open since the install, and generally feel less bouncing as we travel. The trailer also has less bounce when stationary, an added benefit.


It took longer to thaw out my hands than it did for the actual installation, Once I put the 1st one on to figure out how many pucks I needed to add (All 2 for each) and pre-assembling the other 3 the rest was easy. I read several reviews that some went on crooked, there brackets that mount to the spring plate with numbers stamped in them one ending in a 1 and the other ending in a 2, the parts look so similar they can get mixed up by ignoring those numbers, I had to take one apart is how I know. Other than that the 30 degree temperature was the only other hard part!


These SumoSprings have improved the rid of my 5th wheel tremendously! I am so happy I purchased these and had them installed!


Service was excellent as usual. This product has not been installed on our 5th wheel yet but I have heard from numerous people that love them as an economical way to improve the factory suspension.


I was disappointed with this product. The mounting brackets must overlap so therefore one has to be shorter than the other so that they mount straight up & down. The brackets with the ones I got were fine on one spring but on the other were both the same size so the spring sits very crooked and does not really do what it is supposed to do. I was just days away from starting a long trip so no time to deal with it and just left them as they were but removed them when I finally returned. Useless to me at this point.


As I come to expect fast shipping and great tracking. One of the easiest installation I have done on the trailer,


These made a noticeable difference in the way the trailer rode on the highway We observed less bounce when traveling over rough sections and a smoother overall towing experience Definitely recommend these springs


The sumo trailer springs are defective.

Oh no! It is unusual to hear that the springs are defective. I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 09/27/2022


These springs were installed very easily.
make a big difference in pulling the 40' 5th wheel down a bumpy road. There is no more bouncy bouncy when a rough road is encountered. The RV after hitting the rough road does not bounce like it used to but instead, you can see these springs dampen the impact.
These springs are a great purchase.


So far so good. Sumo springs have reduced the movement of items in the camper. No more getting ready to catch items when you open a cupboard.


I have Sumo Springs on my F450 which work well.
Now I purchased them for our Riverstone38RE fifth wheel.
Easy install can’t wait to see how they work.


The Sumo Springs Trailer Helper have made a noticeable improvement in the ride of my trailer while being towed. Installation can be done with basic tools by one person.


Very easy to install. The rough and uneven road and ride on our fifth wheel is vastly improved.


Easy install. Notice a difference right away on rough roads and when making sharp turns the trailer does not sway as much as before.


While I have not had the opportunity to pull my camper with the sumo springs installed, they appear to be well constructed and the installation was trouble free.


installed on 5th wheel camper took 1st trip last week much smoother ride and also took the bounce out of camper when hitting bumps


The install was straight forward. After about 4,000 miles I noticed one was loose. So now I check them regularly. My coach has decreased chucking and less sway in cross winds.


We broke a set of leaf springs.
something to ease the strain of potholes, etc.
They have worked good so far.
They have lessened the terrible bouncing on most roads.


I have ordered a couple items from etrailer and always have a good experience. This item was packaged properly and easy to install. The instructions were easy to follow and there was extra hardware in case it was needed. I haven’t towed it with them installed yet, but I feel confident they will work as advertised.


I think they will work well. I had sumo springs on my 1500 Ram and they were great


works great on all the bad roads in the USA we seem to have now

Show More Reviews

See what our Experts say about this SuperSprings Intl Trailer Leaf Spring Suspension

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Kathleen M
Updated by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Manda E
Updated by:
Manda E
Employee Mike S
Written by:
Mike S

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