SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Overslung
(79 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:$298.55
Our Price: $267.99
You Save: $30.56
This item qualifies for Free Shipping
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 (79)
- 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
- Jounce Springs
- 3000 lbs
- 4000 lbs
- 5000 lbs
- Single Axle
- 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 (79 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: Birdogrega10/24/2020
Easy install needed to get more spacers due to distance from spring to frame happy with results
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.
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: Kevin 08/25/2023
Excellent product and great service
by: Ken01/28/2019
Perhaps this product would work well on a lighter trailer. My trailer has 7K axles and product did not help at all.
Ken
1/29/2020
Replaced with new 8k springs
25
79
Show More Reviews
See what our Experts say about this SuperSprings Intl Trailer Suspension Parts
- How Can I Reduce Bouncing On A Bumper Pull TrailerThere are a few things that can cause bounce with a bumper pull trailer. Generally, bias ply tires would not contribute to trailer bounce, unless they are excessively worn. Trailer bounce is can be caused by worn out suspension components. You will want to get under the trailer and give everything a good look-over. You will want to check and make sure the trailer is completely level when towing. If all of that checks out, it may be the case that you are just not towing enough weight...
view full answer... - Recommended Replacement Leaf Spring for a 2021 Jayco Jay Flight 29RKS Travel Trailer I checked with Dexter and I am not finding anything related to the metal sleeve labeled D72-97 you mentioned. The Dexter springs 072-097-00 are a 25-1/4" leaf spring that is rated for 5,200 lbs. Our closest option to that would be the etrailer item # e34SR you were looking at. The etrailer item # e34SR may work for your Jayco Jay Flight but you'll need to jack one side of your trailer up and take a measurement with the weight off of the suspension. The measurement you are looking for...
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... - 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... - 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... - Helper Spring System for Snowmobile Trailer With 3500 lb AxleTimbren doesn't offer an application, but SumoSprings does. If your trailer has a overslung axle, where the leaf spring pack sits atop the axle beam, use # TSS-107-40 or if you have an underslung axle where the leaf spring pack sits under the axle beam, use # TSS-106-40. Either system is rated for axles with a 3-5K capacity, so it'll work great on the 3.5K axle of your snowmobile trailer. I've linked to product videos for he helper spring systems mentioned above.
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... - Recommended SumoSprings for Trailer With 5,200 Pound AxlesThe # SS26MV for 5k to 8k axles and # TSS-107-40 for 3k to 5k axles are the same size and have the same installation requirements. The only difference between the two is the capacity. The # TSS-107-40 has a 500 lb capacity while the # SS26MV has a 900 lb capacity. Since you're moving to a larger axle and run your trailer heavy, I would choose the SumoSprings with the higher capacity. Keep in mind, adding an axle with a higher capacity and these SumoSprings will not increase the overall...
view full answer... - How To Stop Wheels From Coming into Contact with Floor on Keystone CougarThe SumoSprings Trailer Helper Springs like part # TSS-107-40 do sort of act as bump stops so they could very wheel help stop the wheels from coming into contact with the floor although this is not exactly what they are designed for. You'll want to play around with the kit when installing to see which configuration works best for you i.e. with or without the included spacer. The other option you might consider is lifting the trailer with a kit like the Correct Track Trailer Alignment and...
view full answer... - How To Fix 2019 Vanleigh Vilano 5th Wheel Trailer Leaning To One SideIt is indeed sometimes common for a travel trailer to lean more to one side even when new as that side usually has all of the heavier appliances. This is not really any sort of warranty issue with the leaf springs but I do have an option that should help mitigate the effect of the trailer leaning to one side and that's with the SumoSprings Trailer Helper Springs part # TSS-106-40 for underslung and part # TSS-107-40 for overslung axles. This may not get you back to level but as the springs...
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...
- Upgrade For Trailer Leaf Springs On 3,500LB Trailer AxleI do have a recommendation for you as changing spring lengths and weight ratings can lead to a less than desirable ride quality. And the only way to determine if the longer springs will fit can be different for different trailers. The SumoSprings Trailer Helper Springs for Overslung # TSS-107-40 or Underslung # TSS-106-40 axles will help to provide up to 500lbs of capacity. These jounce springs help to provide a smoother ride by absorbing road shock and also helping to reduce leaf spring...
view full answer... - Will the SumoSprings Trailer Helper Springs Fit a 2020 Keystone Cougar?The SumoSprings Trailer Helper Springs part # TSS-107-40 are compatible with practically any trailer that has a 3K to 5K overslung axle or in other words the leaf springs are mounted on top of the axle. If you have an underslung axle in which the leaf springs are mounted below the axle then you need the SumoSprings Trailer Helper Springs part # TSS-106-40 which is also designed for 3K to 5K capacity axles. I spoke with SuperSprings and they informed me that there isn't a minimum space...
view full answer... - Why Would Shock Absorbers Be Superior To SumoSprings To Reduce Bonce On Travel Trailer 3,500LB AxlesThe shocks on the Roadmaster Comfort Ride Leaf Spring Suspension Kit # RM82MR tend to be superior to the SumoSprings Trailer Helper Springs # TSS-107-40 when you consider the contact area. The SumoSprings will only work as the material comes into contact with the frame. Which on a tandem axle trailer such as one axle compresses the other often moves away from the frame when you hit bumps which only allows one of the springs per axle to get additional support. The shocks on the Roadmaster...
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... - Recommendations For Upgrading the Suspension on a 2018 Grand Design Travel TrailerWith the Timbren options having the lowest weight capacity of 7,000 pounds, I would not suggest going with them. That being said, the SumoSprings # TSS-107-40 will be the ones I do suggest. These are rated for axles with a capacity of 3,000 to 5,000 pounds and will be the better option. The equalizer upgrade will depend on your wheelbase, but having 4,400 pound axles, I would not suggest the MORryde SRE4000. These are rated at 5,200 to 7,000 pounds per axle. We have the CRE3000 for the...
view full answer... - How Can I Reduce The Bouncing On My 12 Foot V-Nose Cargo TrailerYou can eliminate the bounce in your trailer and smooth your ride with the addition of Sumo Springs. You will have two options, depending on how your leaf springs are mounted on your trailer. If your leaf springs are underslung, meaning they are under the axle of your trailer, I recommend the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 3K to 5K - Underslung, part # TSS-106-40. If your leaf springs are overslung, meaning they are over the axle of your...
view full answer...
- Will SumoSprings Trailer Helper Springs TSS-107-40 Work with Overslung AxleThe SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-107-40 was designed for overslung axles like yours and would work great with the 7-1/2 inches of clearance you have now.
view full answer... - Can SumoSprings Trailer Helper Springs be Cut to Fit Trailer CorrectlyYou definitely can cut the SumoSprings Trailer Helper Springs # TSS-107-40 to fit your application if you don't have enough room. We have confirmed this with SuperSprings on multiple occasions. You might also want to make sure that you haven't overloaded your trailer and that your leaf springs are in good shape. Unless you put larger tires on your Keystone Cougar 26RBS than what came as stock you shouldn't be having the tires bump up against the underbelly material unless you are flying...
view full answer...
- Recommended Leaf Spring Suspension Enhancement for TrailerThe SuperSprings Mounting Kit for OEM Leaf Springs Above the Axle # MXKT is designed to be used with a SuperSpring Custom Suspension like the # SSA28 and allows you to mount the springs above the axles instead of below them with the rest of the leaf spring pack. These springs are designed for a truck and not a trailer, so it's really not going to be a solution that would work for you. If you can tell us more about your trailer, like the axle capacity and how many axles there are, we can...
view full answer... - Picking Out Suspension Enhancement for 2018 Cargo Trailer that is 10 Feet LongWe might have a suspension enhancement kit that could fit your trailer axles, but I would need to know the capacity of your axles. The kit you referenced most likely would be rated too high since it's for 3,000 to 5,000 lb axles. For lighter axles we have the part # TTRA1702 which was intended for 1,000 lb axles. If this would not work let me know what axle capacity you have and I'll see what we have that would work best.
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... - How To Find the Correct SumoSprings Trailer Helper Springs for a TrailerIt's pretty easy to pick out the correct SumoSprings Trailer Helper Springs. There are only two things you need to know, the axle capacity and the spring orientation. The axle capacity is on the axle tag which is a sticker in the center of the beam and the spring orientation you can just tell by looking at the leaf springs. If the leaf springs are under the axle then you have underslung axles and if they are over the axle you have overslung. These two bits of info can then be used to select...
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.
Product Experts Available Now!
Call 1-800-940-8924
Larry
12/2/2023
Working great