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  1. Trailer Leaf Spring Suspension
  2. SuperSprings Intl
  3. Leaf Spring Enhancement System
  4. Springs
  5. 5000 lbs
  6. 6000 lbs
  7. 7000 lbs
  8. 8000 lbs
SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Underslung

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

Item # SS33HR
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Our Price: $269.99
Trailer Leaf Spring Suspension
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Shipping Weight: 8 lbs
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Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride. Lowest Prices for the best trailer leaf spring suspension from SuperSprings Intl. SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Underslung part number SS33HR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (29)
  • Q & A (0)
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  • Why etrailer?

SuperSprings Intl Trailer Leaf Spring Suspension - SS33HR

  • Leaf Spring Enhancement System
  • Springs
  • 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.


Features:

  • 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


Specs:

  • Application: 5,000-lb to 8,000-lb single, underslung axle - springs sit under axle
    • For tandem axle applications, use 2 kits
  • Fits 1-3/4" wide spring packs
  • 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 80 percent of original height with full memory rebound
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee


TSS-106-47 Sumo Springs 5,000 lbs - 8,000 lbs GAWR Trailer Helper Springs w/ Bracket - Underslung

Installation Details SS33HR Installation instructions




Customer Reviews

SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Underslung - SS33HR

Average Customer Rating:  4.8 out of 5 stars   (29 Customer Reviews)

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

- SS33HR
by:

Pretty easy install on my tandem axel fifth wheel. I did have to add four additional 1" spacers, one for each spring, to get the additional 1/2" lift desired. To do this I had to buy longer M8X80 mm bolts. I haven't towed it yet but I expect them to perform as promised.



- SS33HR
by:

I got 2 sets of these 5K-8k Sumo springs. I have Sumo springs on my tow vehicle and they are great. items states they fit any axle but would not fit my Dexter 8K axles. These are made for 1 3/4 inch springs and mine are 2 inch. called Super spring and they do not have a bracket for 2 inch springs. I was able to make them work by have a machine shop modify the brackets to fit 2 inch springs. they seem to be doing a good job on my trailer.


Comments
It sounds like you may need longer ubolts. The ubolts labeled “H” in the instructions.
-- Etrailer Expert Sierra K - 09/21/2021


- SS33HR
by:



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


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.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


I placed order for 2 sets of Item #SS26MV and one box the suumo springs was 6inchs tall the other box was 4inch tall suumo springs so not sure what happened but i got 2 diferant types of sumo sprins. Not very happy when i called to check on the order before they arrived i got a strange felling somrthing was not wright by the way they were talking about the items. Very disappionted.


Comments
Customer Service will reach out to you.
-- Etrailer Expert Sierra K - 12/13/2021


- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


These suspension aids are a breeze to install and set up! The most difficult part is jacking up your trailer. If you have a leveling system you can lift one side enough to easily get these installed without lifting the tires off the ground. You could also use blocking or a Trailer Aid too for tandem axle trailers. Looking forward to putting them through their paces on a trip this week to see how much of a difference they make. Expectation is that things inside our fifth wheel won't move around as much and whaling will be reduced. I have not replaced the factory equalizer yet, so this will be a good test.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Great product! Easy install took under an hour to accomplish.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


I really thk Mary she my order out quickly so while Rv was getting repaired they were able to fix my springs and everything at once. Before we leave on are trip



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Easy to install. Improves ride of truck and trailer.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Great service from etrailer, fast shipping with great communication. Easy to install. Have not towed trailer yet but expect them to help my suspension.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


This product came with a mounting bracket that did not fit my spring plate correctly. I called etrailer and the lady I talked to was very helpful and even contacted Sumo Springs for me to help with my concerns.They told her that they hear of this often and its ok to mount on the spring plate even though it doesn't fit correctly. etrailer was great but I'm disappointed that sumo springs don't supply a bracket to address this different spring plate.I have sumo springs on 3 other vehicles that I have owned and installed them on other vehicles with no issues.Come on guys supply a bracket that fits.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Great product. These will further enhance our RV springs and further stabilize sway.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Very informative description of products; quick responses/timely, packaged well for mailing



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Very good company to work with and the sales people are great also.Thank you.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Installed them in no time



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Timely response and quick turnaround to ship products.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


So easy to install, made the trailer ride so much better when I have both Harley's in the garage.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension


Very happy with the install and new rid e.



- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension




- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension




- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension




- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension




- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension




- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension




- SS26MV
by:

Review from a similar SumoSprings in Trailer Leaf Spring Suspension



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Ask the Experts about this SuperSprings Intl Trailer Leaf Spring Suspension



  • Trailer SumoSprings For 9K ToyHauler
    Your toy hauler likely has 6K rated axles, given the weights you've provided. If the capacity printed on each axle tag confirms this, the SumoSprings # SS33HR you'd looked at would be perfect for your toy hauler. The kit is designed for axle capacities from 5-8K on axles that have the leaf springs mounted under the axle tube, like yours. The # SS33HR kit includes 2 springs, so for a tandem axle trailer, you'll need 2 kits. I've linked to a product description video that you might find...
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  • SumoSprings Trailer Helper Springs For Big Tex 14PH Trailer With 7,000LB Axles On Slipper Springs
    You will need to measure the slipper springs on your Big Tex 14PH as the SumoSprings Trailer Helper Springs # SS33HR will only fit leaf springs that are 1-3/4" wide. The bracket that attaches to the leaf springs is 3.2" tall and the spring is 5" tall. Since will want a final compression of 1/4" to 1/2" the you will need at least 7.7" from the leaf spring to the frame. There are three 1/2" spacers included with this for each side that will allow you to reach up to 9-1/2" with the kit. As...
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  • Correct SumoSprings For 2021 Grand Design Solitude 380FL With Tandem 7000lb Axles
    I would be happy to help! Since your 2021 Grand Design Solitude 380FL has tandem 7000lb axles you will need either the SumoSprings Trailer Helper Springs # SS26MV if your trailer has overslung leaf springs (leaf springs on top of the axles) or the # SS33HR if your trailer has underslung leaf springs (leaf springs underneath the axles). For your trailer you will need two kits, one for each axle. I included a video review of the products mentioned for you to take a look at.
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  • Recommended SumoSprings To Improve Suspension On Grand Design Reflection 28BH 5th Wheel RV
    For your 2020 Grand Design Reflection 28BH 5th Wheel RV you will want to use SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung # SS26MV if it has overslung axles where the springs sit over the axles. Use SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Underslung # SS33HR if it has underslung axles where the springs sit under the axles. Keep in mind, the kits mentioned above pertain to a single axle,...
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  • Will SumoSprings Trailer Helper Springs for 5-8K Axles Work with Triple Axle Trailer
    Yes, the SumoSprings Trailer Helper Springs for 5-8K Axles part # SS26MV for overslung or part # SS33HR for overslung will work on a triple axle trailer. You'll need one kit per axle for a total of three kits. There would be no difference between the single, tandem, or triple axle installs. These springs will do a great job of absorbing road shocks while makes for a smoother haul. They will also work to increase stability by reducing side to side sway. .
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    The most economical option we have for supplementing the suspension on your 14,000 pound PJ Trailer will be the Lippert Bolt-On Shock Kit w/ Heavy Duty Gas Shocks # LC281281. These are rated for use with 5,200 to 7,000 pound 3" overslung axles and you will need one kit per axle. This will require drilling and you will need a minimum of 4" of clearance between the inside of the tire and and I-Beam flange. These do work, but as they are the most economical option, they will not be the best...
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    There are two options for SumoSprings for your 2021 Forest River Stealth RQ2715 based on your axle setup. The part # SS26MV is for if you have an overslung axle setup (leaf spring over the axle) or the part # SS33HR for if you have an underslung axle setup.
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    The better option for improving the ride on your tandem axle 2018 Montana fifth wheel with 7,000 lb axles is the Roadmaster shock system, with the correct part being the following: - Roadmaster Comfort Ride Shock Absorbers for Tandem Axle Trailers # RM-2460 The SumoSprings Trailer Helper Springs # SS33HR (Underslung) and # SS26MV (Overslung) are solid, but just won't improve your trailer's ride as much as the Comfort Ride. The SumoSprings progressively compress, and gets more rigid with...
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  • Replacement 4-Leaf Springs and SumoSprings for 5.2K Trailer Axles
    For your application I recommend checking out the 4-Leaf Double-Eye Spring # SP-221275 which measures 25-1/8" center-eye to center-eye and has a weight capacity of 6,000 lbs - which will be just fine for your 5.2K axles. Please note that whatever you do to one side of the axle you should also do to the other side to get the best ride quality and wear. The SumoSprings Trailer Helper Springs are a great enhancement to add since they will also help to cushion the ride and provide better handling...
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  • Are There SumoSprings Trailer Helper Springs for 8K Axles
    The correct SumoSprings Trailer Helper Springs - 5K to 8K - Underslung Axles is part # SS33HR. These kits do a great job of absorbing road shock and keeping the ride nice and smooth. They also feature a bolt-on install so no drilling required.
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  • Which SumoSpring Kit for Trailer Axle that is 5200 lb and Underslung
    Since you have a 5,200 lb underslung axle the correct SumoSprings kit would be the part # SS33HR as the kit you mentioned would be rated too low. Normally you would install this on the front side of the axle. We have also confirmed that this works with slipper springs as well.
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  • SumoSprings Kit that Can be Used on Gooseneck Trailer with 7,500 lb Axles
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    The SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Underslung # SS33HR are designed to provide additional support for a more comfortable ride. Although they may raise your 2022 Cougar 25RES a little bit, it will not be the couple of inches you are looking for. These are not intended to be a lift kit, just to keep you at the normal height. These will, however, provide the shock absorption and sway control you are looking for. If you have already...
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Info for this part was:

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Expert Research:
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Edited by:
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Updated by:
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