SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Overslung
(80 reviews)
Price: $267.99
In Stock
SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Overslung
Item # TSS-107-40
Retail:$305.99
Our Price: $267.99
You Save: $38.00
In Stock
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
- All Info
- Reviews (80)
- Q & A (0)
- Photos
SuperSprings Intl Trailer Suspension Parts - 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
- Did not arrive in time
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 (80 Customer Reviews)
Improves suspension, handling and safety. Progressive spring rate. Provides additional support as needed so you always have a smooth, comfortable ride.by: James 05/30/2024
It seems to stabilize the trailer a lot better than the factory equipment. Less side to side movement and it seems that inside contents are not as bounced around as before.
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: 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: 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.
by: Larry 12/01/2022
Help a lot with the bounce from the leaf springs
Larry
12/2/2023
Working great
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: Birdogrega10/24/2020
Easy install needed to get more spacers due to distance from spring to frame happy with results
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: 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
80
Show More Reviews
See what our Experts say about this SuperSprings Intl Trailer Suspension Parts
- Recommended SumoSprings Trailer Helper Springs For Trailer With 3500lb Tandem AxlesSince your trailer has tandem 3500lb axles the correct SumoSprings Trailer Helper Springs is the # TSS-106-40 if your leaf springs are underneath the axles, or the # TSS-107-40 if your leaf springs are on top of the axles. Both of these kits are designed for axles rated from 3000-5000lbs which is perfect for your trailer, and will fight trailer sway and body roll while also providing support to your suspension to increase its working life. I included videos of the products mentioned for...
view full answer... - Does SumoSprings Trailer Helper Springs Include Two or Four Springs?The SumoSprings Trailer Helper Springs you were looking at are sold in a quantity of two, so you will need one set per axle. Now to make sure you order the correct helper springs you will need to confirm the axle rating of your axles, and check to see if the leaf springs are on top of the axle or underneath. The # TSS-107-40 you were looking at are designed for 3000-5000lb axles with leaf springs on top of the axle. If you have a 3000-5000lb axle but your leaf springs are underneath the...
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... - Recommended SumoSprings For A 2021 Grand Design Imagine 2600RB Travel TrailerSumoSprings will provide a much more noticeable difference in both ride quality and stability than an upgraded equalizer will give you so you're making the right choice. From what I can find on Grand Design's website you should have a 4,400lb axle in the overslung position. If this is correct then you would need the SumoSprings Trailer Helper Springs # TSS-107-40. If your axle is in underslung position then you'll want part # TSS-106-40 instead. Both of these kits will mount to the leaf...
view full answer...
- Recommended SumoSprings for a Coachmen Freedom Express 257BHSI would be happy to! There are two sets of SumoSprings that will work with your Coachmen Freedom Express 257BHS which one you need will depend on the orientation of your axles and springs. These are sold as a pair so you will need one set per axle. I have listed both options below: If your axles sit below your springs you will need the SumoSprings Trailer Helper Springs - Overslung item # TSS-107-40. If your axles sit on top of the bottom of your leaf springs you will need the SumoSprings...
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... - SumoSpring For A 2022 Grand Design 22RBE With Dual 3.5K Overslung AxlesFor your 2022 Grand Design 22RBE with dual 3,500 lb overslung dexter axles the correct SumoSpring kit is part # TSS-107-40. Since your trailer is a tandem axle you will need two of these kits. These are made specifically for overslung axles rated between 3,000 and 5,0000 lbs, so it will work perfectly for your camper. You can expect to see a much smoother ride with less jarring or chucking. SumoSprings will help to reduce sway and body roll. They may also raise the trailers ride height...
view full answer... - 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... - Can I Use SumoSprings Trailer Helper Springs w/ CRE3000 Equalizers?The only compatibility issue I can see is if your shocks are mounted directly above the center of the leaf springs or the top bracket has been replaced to accommodate the shocks. If either of these are not an issue then the SumoSprings Trailer Helper Springs item # TSS-107-40 will be a great addition to your travel trailer's suspension. I have linked a demonstration video below along with the instructions so you can see how this system works and the process to get them installed. These...
view full answer... - Correct SumoSprings Solo Custom Helper Springs for a Travel TrailerI do have an option for you but if you're looking to install SumoSprings on a travel trailer you'll be looking at either the SumoSprings Trailer Helper Springs part # TSS-107-40 for overslung axles or part # TSS-106-40 for underslung axles. They have a 3,000 lb to 5,000 lb capacity. These systems both install by attaching to the leaf springs.
view full answer... - Recommended SumoSprings For A Coachmen Viking Saga 16FB Travel Trailer To add SumoSprings to your Coachmen Viking Saga 16FB you'll first need to know the axle capacity and whether your suspension is underslung or overslung. Underslung suspensions will have the leaf spring stack below the axle and overslung suspensions will have the leaf spring stack above the axle. With the GVWR of your trailer being so low you would likely have an axle capacity somewhere between 3,000lbs to 5,000lbs and would need one of the following kits based on your suspension: Overslung...
view full answer...
- Can the Leaf Springs Be Upgraded On a Lippert 3,500 Lb AxleIt is possible to upgrade the leaf springs on a trailer to a higher rated set but I do not recommend this as it can create a rough ride. The better option would be to install the SumoSprings Trailer Helper Springs part # TSS-107-40 for overslung or part # TSS-106-40 for underslung axles. These will offer both additional support without decreasing the ride quality. If you would still like for me to recommend a set of upgraded leaf springs, I'd need to know the unloaded length from eye to eye.
view full answer... - Suspension Upgrade for 2020 Wolf Pup 16FQYou're very limited on suspension upgrades with a single axle on your 2020 Wolf Pup 16FQ. Since you're worried about suspension component failure, I would add the Dexter Heavy Duty Suspension Upgrade Kit for Single Axle Trailers # K71-358-00. This includes 1/2" thick steel shackle straps, wet bolts, and bronze bushings so you know the components will last. This is one of the best upgrades you can make on any trailer. Outside of that, adding the SumoSprings is going to be the best option....
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... - Sumo Springs For A 2020 Gulf stream Vista Cruiser 19CSKWe do have some Sumo Spring kits which can potentially be used on your 2020 Gulf stream Vista Cruiser 19CSK. Do you happen to know the weight rating of each individual axle or the GAWR? The SumoSprings Trailer Helper Springs # TSS-107-40 are made to work with axles rated between 3,000 and 5,000 lbs, so as long as your axles fit this criteria the Sumo kit will work nicely to help smooth out your ride. I have linked our review and demonstration video for these springs below.
view full answer... - Difference Between Road Armor and SumoSpring for CamperThe SumoSprings part # TSS-107-40 and the Road Armor # LC696740 are both great modifications to the suspension of your RV but they are for different purposes. The SumoSprings will give the suspension more support and the Road Armor makes the ride smoother. So it really comes down which you'd prefer first but they both will work great with each other as well as individually.
view full answer... - SumoSprings Trailer Suspension Enhancement Kit that Fits 2023 Grand Design Solitude S-Class 3740BHThe SumoSprings Trailer Helper Springs part # SS26MV is the correct kit for your 2023 Grand Design Solitude S-Class 3740H that has overslung axles like you described and will do a great job giving you additional suspension support but it will not effectively increase the weight capacity since that's based on more than just the suspension. It also is based on the axle capacity, brake capacity, frame, coupler etc. So just increasing the suspension capacity would not increase the overall capacity.
view full answer... - Leaf Spring Axle Upgrade For 2019 Keystone Bullet Travel TrailerIt sounds like you have the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long # e54SR on your 2019 Keystone Bullet. I recommend relieving the weight off the suspension to see if the springs return to normal heights. I have included the picture below for reference for the following measurements. A-12-9/16" B-13-3/16" C-25-1/8" D-3-1/4" The trailer may have became overloaded and caused damage to the suspension components or even the axle. If you notice an excessive bend...
view full answer...
- Increasing Space Between Your Tires & Fenders On Your TrailerThe Dexter Trailer Springs Over-Under Conversion Kit # K71-385-00 would help increase the space between your tires and fenders. This kit works for 3" diameter axle tubes and is the simplest solution. For 2-3/8" axles you can use this kit # K71-384-00. Heavier springs will help it from rubbing but will really stiffen your ride. Another potential solution that will increase your ride quality would be a SumoSpring. This might just give you just enough support to keep the space between your...
view full answer... - Choosing Between Black and Blue SumoSprings Trailer Helper Springs for Overslung TrailersIn regards to the SumoSprings Trailer Helper Springs for Overslung Trailers, you could in all honesty use either the blue part # TSS-107-40 or black part # SS26MV. It's better to be under than over so I do recommend the black but either will work. If you need to load a little extra you'll have peace of mind that your system can handle it. The blue will ride a bit better but the black will have more support. If you tow light then maybe the blue is best for you.
view full answer... - Is the 500 lbs Capacity at 50% Compression for a Single Spring or Both Springs?The pair is 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. If your axle is underslung meaning your springs sit below your axles you will need Item # TSS-106-40.
view full answer... - How to Determine SumoSprings For Jayco Travel TrailerIt looks like your trailer has a GVWR of just under 5,000 lbs, which narrows down the choices, so to determine the correct SumoSprings you just need to know if your axle sits above the leaf springs or below the leaf springs, as well as the clearance between the top of the spring plate and bottom of trailer frame. - Axle Below Leaf Springs: SumoSprings Trailer Helper Springs # TSS-107-40 (Clearance between top of spring plate and bottom of trailer frame must be between 5-5/16" and 6-1/2") -...
view full answer... - SumoSprings Trailer Helper Springs Fitment on a 2023 Grand Design XLS 23LDEAccording to my research your 2023 Grand Design XLS 23LDE should have tandem 3,500 lb axles in an "underslung" (leaf springs below the axles) configuration. This means you need two of the following SumoSprings kit: - SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-106-40 If the leaf springs happen to be sitting above the axles then you need the "overslung" version instead: - SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40 Let me know...
view full answer...
Do you have a question about this Trailer Suspension Part?
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
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
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.