Replacement Hub and Rotor for a Ranger Boat Trailer

Updated 09/17/2025 | Published 08/30/2025

Products Featured in This Question

DeeMaxx Disc Brakes - 13" Hub/Rotor - 8 on 6-1/2 - Maxx Coating - Oil - 8,000 lbs

(1)

$1076.69

4" Carbon Fiber Digital Caliper

(27)

$12.31

Question:

I have a Ranger boat trailer that has oil hubs. I need the hub and rotor with the treaded studs 10.

asked by: Jack A

Expert Reply:

Hey Jack. There's no database I can look up that shows me what parts are on a trailer like you can find on cars and trucks. What you'll want to do is pull one of the hubs and look at the two bearings. They should have numbers stamped into the sides of them. I'll need those part numbers to identify your spindle size which will tell me what hub you need.

If they do not have numbers stamped into the side you'll need to measure your spindles using a digital caliper like item # PTW80157. I'll need the C and D dimensions shown in the diagram below.

Additionally, I am also going to need to know your lug nut pattern so you do not have to change wheels. I have linked an FAQ below that'll show you how to measure them if you're unsure.

What did you mean by 10? You can add this information and any other questions you have where it says Reply to Jerred H and I'll be happy to answer them.

expert reply by: Jerred H

Bearing Diagram
(click to enlarge)

Jack C.

9/4/2025

Thanks for answering me. Sorry I meant to put 10 inches. The boat is a friend of mying, trying to help him out. When I get the boat back I will give you the info you need. THANKS AGAIN

Jerred H.

9/4/2025

@JackC You're welcome! Yeah let me know what you get!

Jack

9/16/2025

@JerredH Hi Jerred I finial got to measure the axle off my buddys trailer. I need the hub with the rotor. It's for a Ranger Boat Trailer Spindal shaft Dia is 1.680 Grease Seal Seat is 1.680 Inter bearing seat is 1.380 Outer bearing seat is 1. 380 Thread Dia is .800 If you need any more info please let me know.

Jack

9/17/2025

Jerred I forget to say it is an oil bath hub.