Looking For Replacement Leaf Springs For Boat Trailer

Updated 07/10/2025 | Published 07/06/2025

Question:

Looking for a leaf spring replacement kit for a 2019 or 2020 Road King boat trailer. 5000 lb total weight. Also is it possible to upgrade to heavier springs? Thanks

asked by: Christopher A

Expert Reply:

Hello Christopher, thanks for reaching out. We do carry leaf springs so we may have what you need. That said there is no way for me to look up your trailer to know exactly what spring you will need. Trailer manufacturers are just not that specific with their online literature.

Basically I need to know the eye to eye length of your current springs, and the weight capacity of your axle. Jack up one side of the trailer so you can measure the springs when unloaded. Then your axle capacity should be written on your axle tag. Your trailers suspension is built around a certain leaf spring size, so the new springs must be identical in size.

It might be possible to go with a slightly higher rated spring. Don't want to over rate the springs by too much though. Your spring options will depend on what we have available in the length you need. Also keep in mind a higher rated spring will not increase the overall carrying capacity of your trailer.

Reply on this page and get me that info. I am happy to look into it and get back to you with some part numbers.

expert reply by: Jesse M