Replacement 4 Lug Idler Hub for a Popup Camper

Updated 07/06/2026 | Published 06/29/2026

Products Featured in This Question

4" Carbon Fiber Digital Caliper

(26)

$12.31

Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4 - Galvanized

(572)

$39.41

Question:

Hello I bought mastropro part 411250 for my 90s Coleman roanoke. I dont know exactly what I am doing but the wheel hub does not fit the shoulder. When trying the new wheel hub, the threads do not extend. My current wheel hub seemed to have sit over this shoulder so that only the threads were exposed. But the new one doesnt go over the shoulder therefor no threads protruding. AKIHUB-440-2-G-1K would this part work for me? Im obviously trying to get this by the 4th and I am not having any luck even finding the right part. Can you please help me? I will pay you for the help if its not even the right part I am looking at. Pretty please!

asked by: Cody L

Expert Reply:

Hey Cody. There's no database that shows what parts came on a 90s Coleman Roanoke camper, so I am going to need you to take a few measurements.

What you'll want to do is pull one of the hubs and look at the two bearings inside. They might have numbers stamped into the sides of them. I can use those part numbers to identify your spindle size which will help me find 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.

Since you're having trouble with the threads being covered, I'd also like you to measure from where B starts next to A to where the treads start labeled E. This will help me with your shoulder problem.

The Trailer Idler Hub Assembly item # AKIHUB-440-2-G-1K you were looking at measures 4-1/2" overall. This from the edge of the grease seal to where the grease cap fits. If you have a short spindle we do not have a hub that will replace yours.

What lug nut pattern do your existing hubs have and do you see any part numbers stamped into the one you removed?

You can add this information, along with any other questions you have, where it says Add Comment.