How To Determine Which Bearing Protector or Grease Cap is Needed

Updated 02/13/2021 | Published 02/11/2021

Products Featured in This Question

CE Smith Bearing Protectors w/ Covers for 1.781" Hub Bore - Chrome - 1 Pair

(40)

$19.53

4" Carbon Fiber Digital Caliper

(26)

$12.13

Question:

My trailer dust caps measure just a little over 1 3/4 inch are these the proper parts to replace them?

asked by: Art

Expert Reply:

In order to determine which bearing protector or dust cap to use, you'll need to either measure the hub bore diameter or get the reference number from the outer bearing. This measurement needs to be precise in order to get the correct fit, so you'd need to use a highly accurate measuring device like a digital caliper such as part # PTW80157.

The CE Smith # CE16270 bearing protector fits a 1.781 hub bore and is the closest thing we offer to fit something just a bit larger than 1-3/4, so it could potentially be a fit, but you'll want to measure to be sure.

I'll link you to a photo showing where to measure the hub bore.

expert reply by: Mike L