How to Determine Replacement Hub and Rotor for Older Kelsey Axle

Updated 10/06/2020 | Published 10/05/2020

Question:

I have a trailer with kelsey axles. They are hydraulic disc brakes. I am looking for a rotor / hub. The part number on the old one it 90812 or KA90812. Are these still available? It is a 8 lug 5/8inch studs on 6.5. Thanks

asked by: Jake K

Helpful Expert Reply:

Kelsey is not in business any longer so direct replacements are not available, but I can tell you how to go about trying to find the correct replacement hub and rotor/disc brakes for your trailer.

In order to find the correct replacement hubs for your trailer you need to know the weight rating of your axle, and also what bearings your current hub has. You will need to take apart your current hub assembly and look at the bearings themselves; wipe away the grease and you should be able to see the part number stamped directly on them. If you are unable to find them, you need to use digital caliper and measure your spindle to the thousandths of an inch where the bearings and grease seal ride. You can use the photo I've attached to see exactly where you need to measure.

You need to know your hub's wheel bolt pattern; yours is likely 8 on 6-1/2" but I have added a help article which details how you can find it for sure. If you get back to me with this information I'd be happy to try and help you find the correct hub.

I have also added links to our entire selection of hub and rotors and hubs with disc brakes for you to come back to.

expert reply by: Kyle S