SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Overslung
(78 reviews)
Price: $267.99
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SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Overslung
Item # TSS-107-40
Retail:$292.18
Our Price: $267.99
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- All Info
- Reviews (78)
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SuperSprings Intl Trailer Leaf Spring Suspension - TSS-107-40
- Leaf Spring Enhancement System
- Boat Trailer
- Camper
- Car Hauler
- Snowmobile Trailer
- Utility Trailer
- Single Axle
- 3000 lbs
- 4000 lbs
- 5000 lbs
- 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: 3,000-lb to 5,000-lb single, overslung axle - springs sit over axle
- For tandem axle applications, use 2 kits
- Capacity: 500 lbs at 50 percent compression
- Do not exceed the trailer's weight-carrying capacity
- Spring dimensions: 5" tall x 4" diameter
- Compresses up to 70 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-107-40 SumoSprings 3K-5K Trailer Helper Springs w/Bracket-Overslung
Replaces SuperSprings TSS-104-40
Installation Details
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
- Wrong item was ordered
- etrailer mistake
- Alternate product found
Customer Reviews
SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Overslung - TSS-107-40
Average Customer Rating: 4.8 out of 5 stars (78 Customer Reviews)
Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride.by: Scott04/08/2023
I made some brackets to bolt to the frame. Now I have 100% contact with the Sumo Springs. The are working extremely well!
by: Conrad09/04/2022
Easy install. It took me approximately 3 hours for the entire project. That's cleaning a few things up also. I did not notice much difference in "body roll". Honestly,, I never had much before. Now, anytime going over rougher roads, railroad tracks, etc.... That was a big difference. It took a lot of that movement out. I hardly knew the trailer was going over it. I installed these on a 5th wheel.
by: Larry 12/01/2022
Help a lot with the bounce from the leaf springs
by: David 01/11/2024
My only complaint is that even with adding the two provided spacers, I was still a quarter inch short of touching the top rail. It is supposed to be set with a slight pushing down from the top rail. It went on easily and I am sure it will still work whenever there are significant bumps in the road.
by: William 09/16/2023
For the money I believe its the best thing you can do to improve the ride of your trailer. Lessons the shock of the bad roads (like I-95 in south carolina) on the leaf springs and hangers.
by: Dale07/24/2019
These were very easy to installed and have done a great job smoothing out the ride of the camper. It has made a big difference in how the camper tows and has calmed it down with crosswinds and when big trucks pass by. We did not have the clearance to install a shock kit and the tech at etrailer highly recommended these, I am glad he did. So far I am very happy with this product.
Dale
7/25/2020
These are still going strong after a year of abuse from these horrible roads. I still feel that they have done a lot to smooth out the ride of the trailer.
by: Nate03/11/2023
Fantastic upgrade for the cheap factory suspension!
by: David 09/15/2023
Easy Installation. I'm expecting them to act as shock-absorbers, and I haven't experienced any adverse handling issues, so I guess they're working. I haven't noticed any difference in handling, so I guess that's OK. I hoped for additional capacity, too, and that's hard to measure. Sorry this isn't more definitive, but I'm satisfied that they are helping.
by: Darren06/18/2020
When I decided to replace the RV trailer leaf springs I decided to update the suspension by adding Sumo Springs as well. The installation was simple and quick. Between etrailer.com and Sumo Springs websites all the information is available for the do it your-selfer. Thanks etrailer.com for shipping to Canada. I will continue to support your company.
by: David10/22/2020
Kit came with more than I needed but I can see where some trailers might have used different hardware and all scenarios were included in kit. I went with these to help eliminate my tires rubbing against bottom of trailer floor on rough roads "California" and give an overall smoother ride hopefully extending the lifespan of our trailer. I also Installed Dexter EZ Flex at the same time.
by: Douglas08/31/2020
Was easy to install I removed the wheels which made it easy to access the u bolt flange that they mount to I moved the propane line further away from the area, took about an hour to complete install which included greasing the spring mounts.
by: Greg02/26/2020
Simple call to identify part number needed, Fast delivery, Clear instructions, Extremely easy install.
Greg S.
2/27/2021
Great spring support solution to resolve bounce and sway! Perfect addition to our 2019 Riverstone 5th Wheel
by: Tom02/27/2021
Installation was very straightforward and they made a significant difference in pulling.
Tom
2/28/2022
Springs are still getting the job done~!
by: Zach 06/27/2023
These helped the tow quality of my boat trailer immensely. The trailer feels so much smoother on big bumps on the highway and the gear in the boat moves around a lot less than before. Super easy to install as well.
by: Matthew09/30/2021
One year in already? Wow time flies! These sumo springs have been a GREAT addition to our 32' travel trailer. Easy to install and they've been perfect ever since. I definitely recommend these!
Matthew
10/1/2022
Still so glad we got these ... Things stay put in the trailer, no matter how bumpy the roads get!
by: Tom04/05/2021
The only reason I can't give a 5 star is that we haven't taken the trailer out yet to test the sumo's.
From the install point of view, they were great! easy to follow instructions and assembly.
My only suggestion comes from my own mistake. Maybe consider adding an additional line to your step 1. "Ensure the landing gear / jacks / stabilizers are retracted before taking measurements". I had measured and installed two sumo's before I realized the gears were still down which, obviously, messed up my measurements. Thus I had to take off the sumo's, hook up the 5th wheel, raise the jacks, then restart the process. Went smooth after that. My daughter installed one with no problem. Thanks.
Tom
4/14/2022
I believe they are working as advertised. They smooth out the bumps felt inside the trailer. I also installed sumos on our pickup. They make a HUGE difference when pulling our 5th wheel. Very satisfied.
by: Kenneth11/15/2022
Installed with EZ-flex equalizer kit. Easy to install when the suspension is lowered. Make sure to measure the gap between the springs and frame before you take off the wheels. Seems like good quality and does improve the ride.
by: Courtney 09/24/2022
I had always taken the clover leaf ramps on freeways slow while towing my trailer from fear of tipping. It's stupid, but I feel much better going traffic speed on the ramps now with these springs installed on the trailer. I also feel more comfortable towing with side winds. I don't have a lot of experience towing in high winds, but the few trips I have done with moderate winds felt safe.
by: Richard D11/04/2022
After installing the trailer specific sumo springs the trailer is more stable when towing. I would recommend this easy upgrade to your towable RV.
by: Kenneth 10/05/2023
Was having a control issue with my camper, corresponded with Gregory and he knew what I needed to fix the problem, these mad hauling my camper enjoyable and not a white knuckle experience.
by: Michael 01/21/2021
Great add on to our travel trailer suspension to assist in the ride of our leaf spring suspension. We also have MORryde 3000, HD shackle wet bolts , and X-factor crossmembers on our trailer as well. All of the above makes for a great towing experience as we tow our rig between 10 and 15k miles a year from upstate NY to the Rockies as well as traveling the Adirondack mountains and New England with plans for Alaska after COVID. Another great add are the Goodyear Endurance tires on our trailers....fantastic tires! We have a tpms for our trailer tires and I check tire temperature every 2 to 4 hours of travel
With an infrared thermometer.... safe travels!
by: Daniel12/31/2020
Short of installing independent suspension or adding shock absorbers (did this on my 2014 radiance, DIY project, lots of upside down drilling) this is the upgrade for you. Installation and directions are straight forward and only took me about an hour to install. Due to the COVID, we were only able to take four trips since we purchased our 2020 Grand Design 303RLS and these helper springs have made a WORLD of difference. The side to side motion is less and the ride is MUCH smoother. Also changed out our fifth king pin which helped with the chucking. Highly recommend these helper springs and as a bonus, dealing with etrailer is a great experience and they are always there to help and support. Customer service is Top Notch.
by: Birdogrega10/24/2020
Easy install needed to get more spacers due to distance from spring to frame happy with results
by: James09/08/2022
This was probally the single best improvement we did to our 2018 Coleman Light trailer. The have helped reduce the ping pong effect, reduced trailer sway when being passed by semis on the road and made the trailer easier to pull in general.
by: Terry 02/20/2020
Although product was on back order etrailer kept me well informed on order progress which was appreciated. Seems to be a great product,untested at this time. Very easy installation ,hoping for the best.
Terry
2/21/2021
Have had a great experience with sumospings on 31ft 5th wheel,8500 miles, smoother ride and less internal movement of objects.
25
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Show More Reviews
See what our Experts say about this SuperSprings Intl Trailer Leaf Spring Suspension
- Sumo Springs Versus Shocks for Toy HaulerBecause they are maintenance free, less expensive and easier to install than shocks, I'd definitely recommend going with the SumoSpring option. They'll work with your existing leaf spring suspension to help dampen the suspension, but will also reduce sway and body roll during turns. For a tandem axle application, you'll need two sets of the # TSS-107-40 which are compatible with 3000-5000 lb capacity axles. As a bonus, the SumoSprings are also especially effective against porpoising, the...
view full answer... - Suspension Enhancement For 2020 Jayco Jay Flight SLX 244 To Reduce Trailer Tilt and Lean To better stabilize your trailer from all the tilting, I recommend the SumoSprings Trailer Helper Springs # TSS-107-40. They are a progressive jounce spring that will work individually at each leaf spring. They can provide up to 500lbs of support to the suspension helping to reduce the trailer movement.
view full answer... - Will SumoSprings Kit # TSS-107-40 Fit Trailer with Overslung AxlesYes, since you are moving your axle setup to be an overslung setup the correct SumoSpring kit you need is the part # TSS-107-40 as long as your axles are between 3k and 5k.
view full answer... - Will SumoSprings Trailer Helper Springs fit Fifth Wheel Trailer with 4,400 lb AxlesThe SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40 will work with 4,400 lb axles. It will fit your trailer so long as the axle is an overslung axle, which means the leaf spring will be over the axle. If you take a look at the accompanying cut out of the linked installation manual you can see how the springs will mount and what your axle needs to look like for the helper springs to work. When installed the SumoSprings # TSS-107-40 will be a good addition to...
view full answer...
- Recommended Suspension Helper for Stock TrailerI'm not aware of any air bag systems that can be used on trailers, but there are some great options available for jounce style springs that sit on the axles and add some extra cushion; a good example of these are the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Overslung # TSS-107-40. These helper springs are designed for single axle trailers with 3000-lbs to 5000lbs capacity, but if you can let me know the specs on the axle of your trailer and...
view full answer... - Correct SumoSprings for Keystone Passport Elite Travel Trailer 4,400 Lb AxlesThe correct SumoSprings Trailer Helper Springs for overslung axles (axle under leaf springs) is part # TSS-107-40. The springs will be pre-loaded upon installation therefore the space you have between the frame is spring loaded will be less than the height of the spring and bracket. This won't be an issue.
view full answer... - Recommendation For Reducing Toy Hauler Trailer Rear Suspension Sag When Loading a Harley TrikeI recommend installing the SumoSprings Trailer Helper Springs # TSS-107-40 on your 2022 Jayco Jay Flight SLX 8 236TH toy hauler. You will need to measure from the top of your leaf spring mounting plate to the bottom of your frame to ensure you have the required 5-5/16" to 6-1/2" of clearance for the springs to fit. You will need 2 kits as each kit is designed to work with one 3,000lb-5,000lb axle. These will provide additional support to your leaf springs to help reduce the amount the rear...
view full answer... - Recommended Helper Springs for Tandem Axle Boat Trailer with 5K AxlesI'd recommend the SumoSprings # TSS-107-40 for overslung axles with a 3000, 4000 or 5000 lb capacity. The springs mount to the top of the spring pack and will contact the underside of the trailer frame when compressed. The kit includes 2 springs and the mounting hardware, so for a tandem axle trailer you'll need two kits. The SumoSprings will improve your ride and handling while reducing sway and will reduce roll during turns. I've linked to a product demonstration video that you might...
view full answer... - SumoSprings Trailer Helper Springs For a 2022 Forest River Surveyor Legend 202RBLE Travel TrailerBased on the information you provided you will need 2 sets of the SumoSprings Trailer Helper Springs # TSS-107-40 for your 2022 Forest River Surveyor Legend 202RBLE travel trailer. These springs are compatible with axles from 3,000-5,000lbs. Your Surveyor has two 3,500lb axles positioned in an over slung position with the axle below the leaf springs.
view full answer... - How Much Room Is Needed To Install SumoSprings On A TrailerI measured the SumoSprings Trailer Helper Springs # TSS-107-40 and it will be either 6-3/4" with both spacers, 6-1/4" with one spacer, or 5-3/4" with no spacer when measured from the top of the U-Bolt plate to the top of the spring once put together and installed. So you do have some adjustability if needed. It will also accommodate a U-Bolt plate that is up to 5 inches wide. The SumoSprings # TSS-107-40 are made from patented micro-cellular urethane, so there will be no air in them. These...
view full answer... - How Many Of The SumoSprings TSS-107-40 Trailer Helpers Are Needed For A Tandem Axle TrailerThe SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40 will cover one axle. If you have a tandem axle and want to get both of them supplemented, you will need to get two sets. They currently are not offered as combined sets for tandem or triple axles.
view full answer... - Determining The Correct Weight Capacity SumoSprings For a 2021 Grand Design Imagine 2400BHThe SumoSprings Trailer Helper Springs # TSS-107-40 are rated for the weight capacity of each axle. This particular set rating for 3K-5K is the correct weight capacity for your 3,500lb axles on your 2021 Grand Design Imagine 2400BH. Of course you will need 2 sets as they are needed for each axle.
view full answer... - How Wide can the Bracket on a SumoSpring TSS-107-40 Adjust to?I had the bracket SumoSprings Trailer Helper Spring # TSS-107-40 measured, and it will go from 4 1/2 inches at the widest and 3 3/4 at it most narrow positioning. Not knowing how wide the plate is for your MORryde shock kit is, you will need to measure to make sure this will fit or not.
view full answer... - 500 lbs Capacity for the SumoSprings Trailer Helper Springs for 3,000 lbs -5,000 lbs AxlesNope it's correct. As a pair they are rated at 500 lbs at 50% on the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket item # TSS-107-40. This kit is designed for 3,000 lbs - 5,000 lbs overslung axles with springs sitting above the axle. They do not have a 3,000 lbs - 5,000 lbs capacity.
view full answer... - Can SumoSprings # TSS 107-40 be Used with Shock Kit Installed on TrailerThe SumoSprings Kit part # TSS-107-40 would work just fine on a trailer with shocks like what you have. The shocks will still provide the dampening to make it feel less bouncy and harsh whereas the SumoSprings would just give you more support which reduce the bouncing. If you are getting sway though I would recommend you try moving the weight of any cargo in the trailer as far forward as you can and also make sure you are using a ball mount that allows the trailer to sit level as well.
view full answer... - Suspension Upgrade For 2007 Keystone Everest 344JThere are suspension upgrades available for the 2007 Keystone Everest 344J but they are not designed to raise your carrying capacity of the fifth wheel trailer. The carrying capacity of your trailer is set by the manufacturer and cannot be changed. Suspension enhancement is designed to support the existing suspension on the trailer to prevent sagging, improve ride quality, and prolong the life of your suspension components. The carrying capacity I was able to find on line for the Keystone...
view full answer... - Correct SumoSprings for a Bumper Pull Toy Hauler With 2.5K AxlesSince you have a dry weight of 5,150 lbs that would indicate that you have 2.5K axles so the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40 is what you'd want.
view full answer... - Will SumoSprings 7k Trailer Axle Kit TSS-107-40 Fit 2016 Grand Design 350M Toy HaulerYes the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40 will work on your tandem 7k axles. Since this is a single axle kit you'd need a quantity of two of the # TSS-107-40.
view full answer... - How Much Preload Should SumoSprings kit for Trailer Suspension Have When InstalledOne inch of preload is too much for the install of the SumoSprings kit part # TSS-107-40 that you referenced. You want between 1/4 and 1/2 inch of preload otherwise you'll have a harsher ride quality. If you have spacers installed you would need to remove them so that the preload lowers. This process is outlined in the attached install instructions link.
view full answer... - On Part # TSS-107-40 What Is The Minimum Dimension Between Frame and Top Of Spring PlateThe # TSS-107-40 will not work on spring plates wider than 4.25 inches. The total height with the spacers is 6.75 inches, and without the spacers is 5.75 inches. I have attached a review video link below.
view full answer... - Troubleshooting SumoSprings Compressed 1/2 to 2/3s After installationI spoke with my contact at SuperSprings to find out if this would present any issues for you. Although the amount of compression you are describing with the # TSS-107-40 installed is not ideal, they assured me that the system would still work as intended and would not cause a problem. With the amount of compression you are describing, you may need to replace your leaf springs. If you provide me with the measured distance from center eye to center eye as well as the capacity of your axle...
view full answer... - Correct SumoSprings for 2021 Grand Design 240RLSometimes we don't have parts listed if we don't have the information required in our fitguide. You weren't doing anything wrong. According to Grand Design the 2021 240RL has 4,400 lb axles. Since yours are overslung the correct part is the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40. These are designed for 3,000-5,000 lb axles and require 5-5/16" - 6-1/2" of clearance between top of spring plate and bottom of trailer frame. I'm sure you see these discussed...
view full answer... - Can SuperSprings TSS-107-40 Trailer Suspension Helper Springs Be Cut Down if Too Tall to FitAccording to the folks in the engineering department at SuperSprings, the manufacturer of SumoSprings it is acceptable to cut down the SumoSprings if necessary, but be aware that doing so will void the product warranty. SuperSprings recommends cutting as little as possible off the springs.
view full answer... - SumoSprings Helper Springs on a 5th Wheel with Under-Spring 7k Tandem AxleI'm happy to inform you that the SumoSprings Trailer Helper Springs, part # TSS-107-40, will work for your setup. They are designed to sit over the axle and can handle axles between 3K and 5K. I've linked to a video review of these springs for you to look at. Keep in mind that since you have a tandem axle, you will need 2 kits. You can check the product page for this kit's current price.
view full answer...
Do you have a question about this Trailer Leaf Spring Suspension?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Jameson C
Updated by:
Kathleen M
Updated by:
Wilson B
Updated by:
Noah M
Updated by:
Manda E
Video Edited:
Dustin K
Video Edited:
Chris R
Edited by:
Daron K
Written by:
Jessie B
Installed by:
Jacob H
Video by:
Thomas T
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Larry
12/2/2023
Working great