How to Determine Correct Replacement Springs for a 2019 Keystone Fuzion 424 Toy Hauler with 7K Axles

Question:

2019 424 keystone fuzion toy hauler What springs do i need for this trailer..

asked by: Chris W

Expert Reply:

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 correct length for your application. Height can be a factor as well unless you are swapping out all of your leaf springs on all of your axles. If you are referring to suspension enhancement we have that too. Unfortunately we don't have a way to look up exactly what leaf springs you have on your toy hauler.

For a double-eye leaf spring we have the 24-7/8" Long # e64SR and then for a slipper spring (with a "hook" on one end) we have the 26-5/8" Long # e74SR. I have attached some dimensional photos of these leaf springs for you to compare with what you currently have. If these don't match with your leaf springs let me know and I can see if we have something in a higher capacity that matches.

Please note that you'll need to lift the trailer off of the ground and/or remove a leaf spring to get the actual measurements because the leaf spring will flex when under load which will skew your findings. Also, if the new springs are slightly shorter than your current springs then you can still use them as a replacement since springs can elongate over time.

For helper springs that you can add for suspension support we have the SumoSprings # TSS-107-40 for overslung (leaf spring on top of axle) or # TSS-106-40 for underslung (leaf spring under axle).

Attached are some review videos that you can check out.