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

• Upgrading Leaf Springs, Equalizers, and Wet Bolt Kit for 2018 Jayco 265RLS
  Hey Jeff! I can help you find the right parts to upgrade everything but you're going to need to take some measurements. For the leaf springs, you will need to get the spring eye to spring eye measurement or the flat length as outlined in the article I attached further down on this page. You don't want to go too crazy with a higher capacity or you're going to get a rough ride. 4,000 lb leaf springs like the 25-1/4" Long # e57SR or the 26" Long # e22YR would be a good choice if they match...
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• SumoSprings for KZ Sportsmen Dual Axle Travel Trailer
  The SumoSprings Trailer Helper Springs # TSS-107-40 are designed for single axle trailer applications, so for your tandem axle travel trailer, you'll just need two of these kits. These SumoSprings will fit your 2016 KZ Sportmen travel trailer as long as each of the axles is rated between 3,000 lbs and 5,000 lbs and they are overslung, where the springs sit on top of the axle. If your springs sit below the axle, which is the more common setup, you'll want to use two of part # TSS-106-40,...
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• How to Prevent Trailer Axle from Hitting the Frame
  Installing a 4,000 lb capacity leaf spring on a trailer with a 3,500 lb capacity axle will make the suspension stiffer which could then in turn minimize the risk of the axle contacting the frame. However, this is not what I recommend to fix your problem. Instead, I recommend using the SumoSprings Trailer Helper Springs part # TSS-106-40 which will provide you with a rubber bumper between the suspension and frame as you can see in the attached photo. They will not produce a continuous rough...
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• Can 2024 Toyota Highlander Limited Use Weight Distribution Hitch
  Hi Earle; in general, a weight distribution hitch is a no go for unibody vehicles. However, that is not an absolute. I don't see anything specifically calling out weight distribution in the owner's manual so it is possible if the manufacturer says it is ok. I would reach out to a local dealer to see what they have to say about it. Assuming it is allowed, you will need a hitch that is compatible with weight distribution which would be the Curt # C45CR. For the weight distribution hitch...
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• Can the Leaf Springs Be Upgraded On a Lippert 3,500 Lb Axle
  It 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.
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• Solution to 3,500 lb Axle Hitting Frame of Trailer
  Thanks for those photos they were helpful, and the equalizer looks fine; so if the springs are not sagging excessively, what I recommend is adding an over/under kit, or what is commonly called "flipping the axle". What this does is moves your trailer's leaf springs to the top of your axle lifting your trailer approximately the same amount as your axle's diameter (2-3/8") plus the height of the leaf spring pack. For your 3,500 lb axles, you would need two of the following kits: - Dexter...
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• 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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• 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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• Recommended Suspension and Disc Brake Upgrade for a Tandem Trailer w/ 4,400 lbs Axles
  Hey Ken thanks for all the information! I can help you with your suspension upgrade but i have no way to add disc brakes to a 4,400 lbs axle and keep your 6 lug pattern wheels. You would need to upgrade your axle or find a 4,400 lbs idler hub with a 6 on 5-1/2 bolt pattern. You could use the Hydrastar Disc Brake Kit item # HYD24VR which is a slip-on rotor if you do find an idler hub. We only have a hub and drum assembly left for 4,400 lbs axles item # 8-407-5UC3-EZ. As far as suspension...
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• Where To Install SumoSprings Trailer Helper Springs TSS-106-40 On Trailer With Tandem Axles?
  Hello Mike, thanks for reaching out. I see you already have the kit on order, but I wanted to make sure your question was answered. When Installing the # TSS-106-40 Sumo Springs on a tandem axle trailer, the helper springs will get installed in the front part of the rear axle closer to the equalizer, and on the rear part of the front axle also closer to the equalizer. Leave a reply below and let me know if there is anything else I can do to help.
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• Recommended SumoSprings for a Tandem Axle Trailer w/ 7,000 lbs Underslung Axles
  Hey Jp, welcome back! Since your trailer has 7,000 lbs underslung axles, you'll want the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket item # SS33HR. This kit is rated for 5,000 lbs - 8,000 lbs axles so it's going to provide way better support than the item # TSS-106-40, you were looking at. The SumoSprings item # SS33HR are going to work great for reducing trailer sway, absorbing road shock, and they'll also help with that body roll top heavy feeling. These kits are sold...
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• Best Suspension Upgrades For 2026 Grand Design Imagine AIM 16mla
  Hey Keith, congrats on the new camper! Adding SumoSprings are definitely one way to help absorb road shock, smooth out the suspension and protect the trailer and its contents. I'd recommend those, and also an upgraded HD shackle/wet bolt kit. I'm not sure if your camper came from the factory with wet bolts, but if not, that is definitely a worthwhile upgrade. The HD shackles and wet bolts really help quiet down the suspension plus they are way more durable than typical stock suspension....
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• What Can Cause Trailer Bouncing And How To Reduce It
  Hello Perry, thanks for reaching out. There are a few things that can cause bouncing with your trailer. One of the most common causes of this is worn out suspension components. If the leaf spring are new though we can rule this out. Unless the new leaf springs you put on are not rated correctly for the trailer. If the springs are too strong or not strong enough it can cause bouncing. You will want to make sure the trailer is being towed as level as possible. You will also want to check...
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• What Causes Trailer Leaf Springs To Break Continuously
  Yes, leaf springs must be replaced in pairs which is why one side left go and then the other shortly after. In regards to the stent you get on a full set of leaf springs, there are really a ton of variables present here so it is hard to predict. However, if you are a full-timer then odds are your trailer is going to be subjected to harder conditions and most likely more weight than the average trailer therefore your suspension components will wear faster. I have attached our leaf spring...
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• Warranty Length and Improvements that Lippert Center Point System Offers to Trailer Installed On
  The Lippert Components Center Point by Trailair Air-Ride Suspension Upgrade # LC1565391 that you bought has a 90 day warranty. This system has only one inflation point which equalizes the pressure between both sides of the trailer so it does not have a way to have more pressure in one side than the other. This system is designed to greatly improve the suspension performance and ride quality of the trailer you install it on but does not necessarily provide additional support although it...
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• Recommended Suspension Support for a Single Axle Travel Trailer
  Hey Cat, thanks for the information. The SumoSprings Trailer Helper Springs w/ Line Relocation Bracket item # TSS-106-40, you were looking at, is designed for trailers that have their axle mounted above the leaf springs. From the information I can find online it looks like your trailer has the axle mounted below the leaf springs or overslung. If your axle is mounted underneath your leaf spring, the SumoSprings item # TSS-106-40 won't work without modifying your suspension. You would need...
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• What Is Causing My New RV To Bounce?
  Hey Lee. Yes I can help with that. What's going on? Send me as much detailed info as you have and I am happy to look into it and help you get to the bottom of it. Typically, bounce is caused by worn out or undersized suspension components, or by the trailer being loaded way too light. Sometimes you can add a helper spring like part # TSS-106-40 to help stabilize things. Lets see what you have going on and what can be done to address it.
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• Recommended Suspension Improvement for a Single Axle Travel Trailer
  Welcome back Michael. To improve the suspension on your 2022 Jayco Jay Flight SLX 154bh, I recommend one of our SumoSprings Trailer Helper Springs Kits item # TSS-107-40 if your axle's mounted below your leaf springs or item # TSS-106-40 if your axle's mounted above your leaf springs. The SumoSprings Trailer Helper Springs Kits mount above your Jayco's leaf spring assemblies and provide cushioning between the axle and frame. This does a great job of absorbing those jolts you get when...
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• How Can I Reduce The Bouncing On My 12 Foot V-Nose Cargo Trailer
  You 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...
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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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• SumoSprings Kit Recommendation for a Single Axle Boat Trailer and a 1,500 lb Boat
  Hey Carlos, thanks for reaching out! Sounds like you're needing the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-106-40. It might seem like the specs you referenced don't quite match up, but you only told me the weight of the trailer and the boat - I'm sure the axle is rated for a little more than that. And the spacing you have, I'm guessing was taken while the boat was loaded whereas the spacing SumoSprings talks about is with the trailer unloaded. So, you're actually...
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• Recommended Suspension Upgrade to Fight Sway on a Tandem Axle Trailer w/ 3,500 lbs Axles
  Hey Carl welcome back! Out of those options, I would recommend going with the Roadmaster Comfort Ride Shock Absorbers item # RM-2450. These would definitely add quite a bit of lateral stability and overall improve your towing experience. You run the risk of damaging a number of components if you blow a tire. That's just part of the fun of towing. I do not think a cushioned equalizer is going to improve the violent swaying you're encountering. Another option is to install the SumoSprings...
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• How to Prevent Sagging on a Travel Trailer
  We do have a solution for your 2015 Keystone Hideout 27DBS's sagging leaf springs. They are called SumoSprings and they provide progressive load support that gives you additional support as needed. They work great to balance off center loads like the issue you are experiencing. It sounds like the passenger side of your trailer is noticeably heavier because of a slide out or kitchen. The SumoSprings act as shock absorbers, taking the brunt of bumps and rough roads. We have two options...
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• How Can I Improve Ride Quality on My Enclosed Trailer for Hauling My Carbon Fiber Bicycles?
  Hello Michael. I understand your concern as the carbon fiber bike frames are very delicate. I do not have an axle to offer that is going to improve the ride quality, the only axle that could do that would be a torsion axle and unfortunately we do not carry them. Upgrading your trailers suspension components will definitely help. You mention that you have 3 leaf leaf springs on the trailer, the more leaves you have on the spring will improve ride quality. You will want to measure it eye...
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