How to Pick Out Leaf Springs for Trailer and Suspension Enhancement with 7k Capacity

Question

Question:

Hi, I have a 2016 350M Momentum and the leaf springs are failing. I am curious about what new leaf springs I should get to upgrade them. Also is there a way to mount air bags to take over some of the duties of the leaf springs? Any help would be greatly appreciated.

asked by: Tayler M

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Expert Reply:

If you can get me the axle capacity of your trailer and the current lengths of your leaf springs I can determine which of our leaf springs would be the best choice. I was unable to locate that info. We have Timbren kits that are designed for adding additional suspension support like the part # TTRA1032 which can provide up to 7,000 lbs of additional support.

expert reply by: Jameson C

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Answer 1

The instructions for the SumoSprings kit part #TSS-106-40 do not specify whether they should install in front of or behind the rear axle but I would recommend in front of the axle since most shock is going to be first on the front portion of the…

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Answer 2

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…

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Answer 3

I was able to find that your 2019 Keystone Fuzion 424 Toy Hauler has 7K axles and while we do have leaf springs for 7K axles, you'll need to take some measurements of your leaf springs to ensure that you get leaf springs that are the…

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Answer 4

The height of the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket #TSS-106-40 is 4 inches for just the rubber spring portion of it. Since you have 3 inches from the axle to the frame that would indicate that there would be a compression…

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Answer 5

The SumoSprings Trailer Helper Springs part #TSS-106-40 per the instructions will be installed on the side of the axle closest to the end of the leaf spring that is connected to a shackle or center link.

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Answer 6

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.…

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Answer 7

Based on what you are saying and your photos, it apprears you have springs that are double eye springs. The springs will need to be based on the load of your trailer. The axle capacity may be difficult to know as you said it appears to be custom. I…

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Answer 8

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 9

Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are…

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Answer 10

Well shackle length is mainly based on the height difference between the front and rear hangers. The rear hanger normally doesn't hang as low as the front so that the shackle can offset the difference and add the ability to move. What is the…

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Answer 11

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 12

For a single axle trailer, you want the shackle strap to be able to move so that you have the spring deflection needed for your suspension. Angled like the photo or even almost vertical is fine you just don't want the shackle strap to bind and…

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How to Pick Out Leaf Springs for Trailer and Suspension Enhancement with 7k Capacity

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