How To Determine What Size/Type Of Bearings Are Needed For A Boat Trailer

Updated 10/22/2025 | Published 04/02/2025

Question:

Hello, I am trying to figure out what size/type of bearings I need to fix my boat trailer. I am hoping thats something you can help me with.

asked by: Jasper

Expert Reply:

Hello Jasper, thanks for reaching out. I can definitely help point you in the right direction. The best way to determine what bearings you need will be to pull a hub and remove the bearings. Each bearing will have a number stamped on the edge, or you can measure the ID with a micrometer. Also measure the ID and OD of your seal.

If you can provide me with your bearing numbers and seal size, I can tell you which bearing kit you will need.

expert reply by: Jesse M

How To Measure Spindle And Bearings
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Jesse M.

10/22/2025

Hey Jasper, were you able to pull a hub and find the bearing and seal numbers for your boat trailer? Once you have those details, I can help match the right bearing kit. Let me know what you find so we can narrow it down.