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SuperSprings Intl

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

Part Number: SS26MV

330 Reviews | 186 Questions

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$306.99

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supersprings intl trailer suspension parts leaf spring enhancement system boat camper car hauler snowmobile utility sumosprings helper springs w/ line relocation bracket - single axle 5k to 8k overslung

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Hands-On with the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket

SumoSprings Trailer Helper Springs Installation - 2018 Forest River Cedar Creek Champagne Fifth Whee

All You Need to Know About the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket

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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. Great Prices for the best trailer suspension parts 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 etrailer.com or call 1-800-940-8924 for expert service.

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SuperSprings Intl Trailer Suspension Parts - SS26MV

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, 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:

92% were satisfied with this product

8% of customers were not satisfied

etrailer mistake
Product did not meet expectations
Wrong item was ordered

8% of customers were not satisfied

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Product did not meet expectations
Wrong item was ordered

4.7

330 reviews

5 Stars		(272)
4 Stars		(37)
3 Stars		(7)
2 Stars		(7)
1 Star		(7)

by: Brian 06/29/2026 One Year Later

I bought these in conjunction with a used pair of the same for our double axle Grand Design toy hauler. The camper rode lower on the driver side, ever with the new 4K springs. I installed the driver side Sumo’s with an extra spacer that helped level it out. The camper tows smoother and after a year the Sumo’s are still in great condition and doing well. I did retighten the mounting hardware after 1000 miles but otherwise very happy with them. We are full time traveling so about 15k miles on them.

by: Steve 08/06/2026

These sumosprings are doing exactly what I had hoped! Much smoother and stable in turns and overall. Great product!

by: Mitch 06/19/2026

Clearly well-built and easy to install. I installed a similar suspension system on my truck which smoothed out the ride, particularly under load, and I have no doubt these helper springs will provide the same results for my RV.

by: Kevin 03/23/2026

Installed on tandem-axle fifth wheel. These really help to soften the impact of the suspension bouncing around on rough roads, and will support 900 lbs. per axle at 50% compression. Installation was straight forward, and the line relocation kit that comes with them is perfect! However, they lose a star because 10 lb.ft. on the pinch bolts per the instructions is not enough. I had one fall off the first trip I took with them. Of course you can’t order just one, so I had to order another whole set to replace the lost one. Tightened all 4 to 28 lb.ft. since they are grade 5 bolts. Hopefully no more will fall off now.

by: Robert 06/06/2026

Easy to install on my 5th wheel. Hard to tell how it works until I take the 5th wheel for a trip.

by: Mark 02/13/2026 One Year Later

the Sumo Springs took the sway out of the trailer and stopped the spring shackles from bottoming out on the frame

by: Rod 05/09/2023 One Year Later

My toy hauler when loaded maxes out the 2 8000# axels. These Sumo Springs stop the over travel of the suspension and stops the spring sag that these trailers are noted for. The ride is more under control and there is less effect on the contents.

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by: Steve 05/23/2022

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.

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by: Gary 12/15/2022 One Year Later

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!!

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by: Vince 05/29/2024

Sumo springs work great. I was a little skeptical if they would work since the Dexter 5100 lb axles on my trailer have two ribs going across them, I'm assuming for strength. The sumo spring bracket was just wide enough to sit on top of the rib center point. The bracket could be 1/2" wider, it would help. I tapped the bracket in and torqued it. As you can see it didn't go in all the way but seems to be ok. Took a road trip, highway, gravel and a rough forest road. Checked the torque after the trip and nothing moved. Sumo springs helped with the trailer sway and should take some load off the springs and shackles. I am pleased so far with this product.

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by: Justin (Five for the Journey on YouTube) 04/09/2023

We purchased these SumoSprings for our 2019 Heartland Fuel 250 knowing that they would not fit our leaf spring top plates, but I knew I could modify the mounting bracket to accommodate our RV. For anyone who has Dexter axles with shocks, you most likely have a 5-1/2” wide leaf spring top plate. If you are handy and have an acetylene torch or map gas you can simply heat and bend the inside bracket, drill a 1/2” hole and through bolt it to an existing hole in the top plate. I actually think this is a more secure install. Overall, it would be nice if there was an exact fit for our Rv, but it was an easy fix. Great product.

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by: Philip H 01/05/2024 One Year Later

Only 4 stars since I have only used them on one RV trip so far. I installed these in conjunction with an equalizer upgrade (Morryde SRE 4000) on my 2019 Grand Design Reflection TT. For the one trip I have been on, I liked how these helped cushion the ride of the trailer. I would certainly buy them again.

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by: Silva 01/22/2023

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.

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by: Tom 01/24/2024 One Year Later

2020 Cyclone 3 axle toy hauler. Can definitely tell a big difference in how quick the trailer settles down over large bumps like bridge transitions. Things inside seem to travel better.

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by: John 03/01/2023

Very easy to install plan taking big trip in a few months can’t wait to see how they handle. Update to follow.

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John One Year Later

3/5/2024

Ok it’s been a year and I have to say this product is definitely worth the investment. After taking it on a month long journey from Oklahoma to California I noticed improved handling especially along winding narrow roads. The trailer tracked well and I noticed less jolting. I also noticed the body roll diminished when in high winds or being passed by bigger trucks. Great product definitely recommend if you do allot of long hauls.

Jesse M.

3/6/2024

@John This is great stuff John, thanks for sharing. This is exactly what the Sumo Springs are supposed to do, and I am glad to hear you are happy with the results.

by: Jay 12/07/2025

So far I'm impressed with the SumoSprings. I got them as an upgrade for my Wolf Pack 365Pack16. The stock springs were destroyed after a year and about 15k miles towing. So I installed a stronger spring and these. I'll know how well they work after I tow to FL from IN in a couple weeks.

by: Tim Gallagher 07/14/2021

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.

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by: John 06/03/2026

I love them, they will help stableize the springs on the RV, I only put one round disk on each spring not sure what weight class that put them in

by: Larry 10/22/2025

I interrupted traveling on the road. I’m looking forward to doing it hoping vines, but I’m looking for anything. Have a good day.

by: Larry 02/12/2024 One Year Later

Easy to install only a couple hours for both axles. A more stable ride and haven’t broke any leaf springs on these great American highways, by the way I installed them on a 38’ 5th wheel rv.

Larry One Year Later

2/14/2025

Working very well, totally satisfied with this product

Jesse M.

2/14/2025

@Larry Awesome! Glad to hear you are still happy with your sumo springs. Come back anytime you need anything!

by: John 11/20/2022 One Year Later

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.

John One Year Later

11/21/2023

No problems at all, everything I said in first review remains, the refrigerator doors stay closed, despite some very bumpy roads, and we travel about 6 month each year in 5th wheel!

Mike L.

11/21/2023

@John We're happy to hear that, thank you for checking back in!

by: Melvin 04/14/2025

The difference SumoSprings have made while towing our 43-foot, 16,000 lb fifth wheel over the past 900 miles is remarkable. The ride is noticeably smoother, sway from passing vehicles is significantly reduced, and the jarring bounce from bridges and bumps is gone. It's a vastly improved towing experience. Interestingly, similar to a couple of other reports, we did find a few things had moved around or opened during this trip, which hadn't happened before. I'm curious if this is a side effect of the SumoSprings or just the inevitable result of a long haul on I-95.

by: Patrick 03/23/2025 One Year Later

Made a huge difference when traveling on I90 to Montana across the Dakotas. Time before we added the sumo springs our 43’ Toy hauler was going to break the truck in two when hitting frost heaves and bad bridge approaches, 100% improvement after we installed.

by: Rock 01/06/2023 One Year Later

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.

by: Cynthia 02/11/2025 One Year Later

I actually have noticed no improvement in the ride of my 5th wheel. There are still cabinets falling and fireplace glass unhooked. My entire closet even fell on one side. The roads are in such atrocious condition, I just don’t think these sumo springs are enough. I’m planning to bite the bullet and just get independent suspension. The road condition will not improve. It was with a try though. They’re easy to install, particularly when packing the bearings suns the wheels are off and you have unfettered access.

Gwendolyn Y.

2/12/2025

Hey Cynthia. I'm sorry to hear that these didn't help with your 5th wheels handling. I know it can be daunting to look at the independent suspension options we have so if you have any questions at all let me know. I'm here to help answer your questions or get any additional information you may need to make sure you are getting what you want and need for a smoother ride.

Cynthia One Year Later

2/13/2026

I actually think that the Sumo Springs made the ride worse. I reminded them and installed independent suspension. There is great improvement in the ride now

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See what our Experts say about this SuperSprings Intl Trailer Suspension Parts

Do you have a question about this Trailer Suspension Part?

Recommended Suspension Upgrade for a 2021 Grand Design Solitude
Hey Frank. The SumoSprings Trailer Helper Springs w/ Line Relocation Bracket item # SS26MV you were looking at are going to take some of the bounce out of your trailer's suspension. They will smooth out your ride as they essentially act like shock absorbers so you won't feel as much of the road. You'll need two sets for a tandem axle trailer. I also saw you were looking at the Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers item # RM-2460-2580. This is by far the...
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Solution for Replacing Curt Turning Point on 2024 Grand Design Reflection 295RL
Hey Scott! The Turning Point bolt pattern is unique so the Helux isn't an option. In fact, none of the cushioned pin boxes with a standard king pin are able to replace the Turning Point. Does your daughter have a long bed? If so, she could switch to a gooseneck setup using the Gen-Y # GY48GR or the Shocker Hitch # SHK69YR. If it is a short bed clearance may be an issue. It looks like that Reflection already has the CRE3000 equalizers on it so that isn't an upgrade that can help. Another...
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Replacement Leaf Springs for 2022 Grand Design Solitude With 7k Axles
Hey JT! Sorry to hear about your trouble with the leaf springs. Hopefully there wasn't a lot of damage and everyone stayed safe. From what I have found the 26E-3500 is the same as the Dexter 072-027-00. This is the 6-Leaf Double-Eye Spring for 7,000-lb Trailer Axles - 24-7/8" Long # DX75CR. I recommend double checking the measurements of this leaf spring to make sure they line up with what was put on, see the attached photo. If you can find a 6-leaf double eye spring with a higher rating...
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Should I Upgrade to 8K Leaf Springs on My Toy Hauler with Tandem Axle Set-up 7K?
Hello Matt, Thanks for writing in, that’s a great question. I’ve definitely heard the same concerns about the factory leaf springs on these, especially on larger toy haulers like your Wolf Pack. It makes sense to want something that’s going to hold up and not leave you dealing with sag or premature wear. When it comes to your suspension, I don’t recommend going up to 8K springs on 7K axles. That can actually create a much harsher ride and lead to more bouncing, which puts additional...
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Will Over/Under Kit Work With MORryde X-Factor Crossmember
Hey Peyton, Yes, those things are all indeed compatible as the crossmember won't come into contact with the over/under kit. As for the correct kit, that depends on the size of your Keystone Cougar's axles. For 2-3/8" diameter axles use the Dexter Trailer Springs Over-Under Conversion Kit # K71-384-00; for 3" diameter axles use the Dexter Trailer Springs Over-Under Conversion Kit # K71-385-00. Then you can use the SumoSprings but you need to have between 5-5/16" and 6-1/2" of clearance...
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Are There Extra Spacers for the SumoSprings Trailer Helper Springs
I do have an option for you but SuperSprings does not offer any additional spacers for the SumoSprings Trailer Helper Springs part # SS26MV. That said, we do still have spacers that will work for this, the Timbren Spacer part # A25723-90AH00 for 1" or part # TA25722-90P00. These won't be the exact same as the ones that came with this kit but they will still work well. In regards to the carriage bolts, you'll need to source this locally from a hardware store.
view full answer...
Solution to Prevent 2023 KZ Travel Trailer From Bottoming Out
Hello Derek; unless the leaf springs you have now are worn out and flat you aren't going to be gaining any real height from other leaf springs. If your leaf springs run under the axle (underslung) you could move them to the top (overslung) using the Dexter Trailer Springs Over-Under Conversion Kit # K71-384-00 (2-3/8" diameter axle) or # K71-385-00 (3" diameter axle). However, I'm guessing they're already sitting on top which is the case for most travel trailers. Another option is to use...
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Best Trailer Suspension Upgrade For Under $1,000
Hi James! I was able to find one whole picture of the underside of a 2024 Grand Design Momentum MAV 27MAV (insert a sigh here), but no actual axle info. However, with the fully loaded weight being right at 11,000 pounds, you most likely have 5,200 to 7,000 pound axles and the picture I found showed the axle under the leaf springs (overslung). With that information, I recommend going with the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung...
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How to Reduce Ford F-250 Jiggling From Grand Design Travel Trailer
There are a few different things you can do to help with this. It would also be helpful to know what kind of jiggling you're experiencing. Does it just feel bouncy and rough? Is it side to side motion? If your travel trailer weight is more than 50% of your trucks GVWR then it would be a good idea to use a weight distribution hitch which will level you out and reduce sway. If it is more like a rough ride then you could try an upgraded equalizer, shocks, or adding something like SumoSprings...
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Replacement Suspension Components for 2024 Big Tex 16GN
Hi Conrad! That doesn't sound good, hopefully it didn't cause you too much of a problem when those bolts failed. I would be happy to help you find some upgraded parts. However, we don't have a way of knowing what is on a particular trailer. It looks like you have 8k axles with a slipper spring suspension on there so there isn't a lot that can be swapped out/upgraded. Depending on your bolt measurements you may be able to add wet bolts like # 126B2. If you can get your leaf spring measurements...
view full answer...
Will The SumoSpring Trailer Helper Springs Help To Reduce The Trailer Jerking and Chucking?
While the SumoSprings Trailer Helper Springs # SS26MV are primarily designed to assist the leaf springs on the trailers and smoothen out the road shock being transferred from the wheels to the trailer it will only have a minimal impact on jerking and chucking. The best way to help with chucking and jerking is with a Cushioned Hitch # SHK29VR or Pin Box # MR94VR depending on your application. If you can tell me what trailer you have along with the truck and method of towing you are currently...
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Should I Go With SumoSprings or Timbren for 2023 Grand Design Reflection 320MKS
Hey Jeff! For your 2023 Grand Design Reflection 320MKS with 7,000 lb axles, both the SumoSprings and Timbren SES are good options since they work with your existing leaf spring suspension rather than replacing it. My recommendation would be the SumoSprings because their progressive design does a great job of absorbing road shock, reducing bounce and sway, and adding support without making the ride unnecessarily harsh. For your 7,000 lb axles, you’ll want the SumoSprings rated for 5,000-8,000...
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Best Suspension Enhancement Recommendation for 2026 GMC Sierra 3500HD Denali Dually
Hey Trevor, the best suspension enhancement we offer for your 2026 GMC Sierra 3500 Denali dually is the Roadactive part # RAS3611-CHD. This will give you the suspension support you are looking for while also not affecting unloaded ride quality which every other option does and it also doesn't require any maintenance. What kind of 5th wheel do you have?
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Can I Use Helper Springs on My 2020 Grand Design Solitude Fifth Wheel with 2 Axles Rated at 7k?
Hello Steve, Yes, you can most definitely add helper springs! This is a great way to improve your ride quality better while towing. I see that the 2020 Grand Design Solitude Fifth Wheel comes with 2 axles rated at 7k so you will want one of the following: If your leaf springs are located at the top of your axle you will want the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket - Single Axle - 5K to 8K - Overslung # SS26MV. If your leaf springs are located under the axle...
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Will SumoSprings Rebel Contact Plate Help with Offset Trailer Frame?
Hey Jay, thanks for reaching out! The SumoSprings Rebel Contact Plate for Offset Trailer Frames # SS89EV is definitely what you need if your SumoSprings kit isn't quite lined up with your trailer frame. When I read Step 3 of the instructions for the SumoSprings Trailer Helper Springs # SS26MV, it says you need to use the included spacers so your springs and spacers are 1/4" - 1/2" taller than the gap between your frame and the top of your leaf spring. If you're saying you have a 4" gap...
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Hey Siamak, the best solution would be a SumoSprings kit part # SS33GR for your 2021 Nissan NV200 which will give you the additional support you need when towing to reduce sag. We don't have any leaf spring style suspension kits for your vehicle but the SumoSprings will work really great!
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Can I Install Sumo Springs On A Curt Axle With ABS (Anti Lock Braking System)
That is a great question. Curt (formerly Lippert) has very recently started offering ABS axles for newer Solitude models. We have not gotten a chance to attempt to install a Sumo Spring kit like the # SS26MV on an axle with the anti lock braking system. It certainly will be an issue with these Curt axles going forward. As of right now it we cannot say with certainty what will fit and what won't. That said, we do not recommend modifying the clamps or brackets in any way as this will void...
view full answer...
Can Additional Spacers Be Added To SumoSprings Trailer Helper Springs?
I have seen an additional spacer added to the SumoSprings Trailer Helper Springs # SS26MV. The kit does include four 1/2" spacers already for customizing your fit. If you need an additional 1" Spacer # A25723-90AH00 you would need to source longer bolts from a local hardware store.
view full answer...
Best Sumo Springs For 2024 Open Range Roamer 364BSH
Hello Camilo, thanks for reaching out. For your 2024 Open Range Roamer 364BSH I recommend the SumoSprings Trailer Helper Springs # SS33HR. These are made for axles rated between 5,000-lbs and 8,000-lbs. I am not sure exactly what axles are on your camper since that info is not listed online, but since your GVWR is 13,500 lbs your axles must be rated for something like 7,000 lbs apiece. I do suggest that you check your axle tag to verify the weight capacity but as long as it is between 5K...
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Will SumoSprings Kit SS26MV Help Suspension of 2013 Heartland Cyclone
Hey Jay, the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # SS26MV that you referenced is going to do a great job providing additional suspension support for your 2013 Heartland Cyclone with triple 6k axles. You would need to order three of these since this is for a single axle. It sounds like your suspension is bouncing around a lot when towing? Is that right?
view full answer...
Can Roadmaster Comfort Ride System Install with SumoSprings on Trailer
Hey Dale, you can install Roadmaster Comfort Ride Shock Absorbers for Tandem Axle Trailers # RM-2460 with a SumoSprings kit like the part # SS26MV. The SumoSpring would just engage a little earlier since it installs on top of the u-bolt plate which will be a little bit taller with the Comfort Ride system installed. Are you axles above or under the leaf springs of your trailer? The part # SS26MV is for overslung axles and the part # SS33HR is for if they are underslung.
view full answer...
Recommendations to Flip the Axle and Upgrade Suspension
Hey Derek, If you're wanting to "flip" your axle to raise your trailer, you'll need the Dexter Trailer Springs Over-Under Conversion Kit part # K71-385-00. This kit is for 3" diameter axles with double-eye leaf springs and will raise your axle 4.5" to 5" for additional clearance if you're planning on rougher terrain. This is a single axle kit, so if you have a tandem or triple, you'll need to order more than one. The Lippert Bolt-On Shock Kit w/Heavy Duty Gas Shocks part # LC281281...
view full answer...
Recommended Replacement Shackles and Wet Bolts for a 2020 Grand Design Solitude 380FL
Sorry about your troubles, I would be worried about the other ones failing too. To replace the shackles and wet bolts you will want to use the MORryde Suspension Upgrade Kit with either 2-1/4" Strap Kit item # MR46ZR or a 3-1/8" Strap Kit item # MR76ZR. You will need to measure the length of your current shackles and pick the kit closest to them. As far as replacing your leaf springs and equalizers go there's no better time to do it if you're already replacing your shackles and wet bolts....
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Recommended SumoSprings For A 2016 Forest River Wildwood 28DBUD Travel Trailer
Hey Lance, To determine the correct SumoSprings for your 2016 Forest River Wildwood 28DBUD we'll need to first see if your leaf springs sit above or below the axle and we'll need to know the axle capacity. If your springs sit above the axle then you have overslung suspension and if they sit below the axle you have an underslung suspension. For the capacity you likely have a 3,500-4,400lb axles but you can verify by looking at the axle for the a sticker that lists the capacity. I've separated...
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