I'll just be honest, there is not a simple way to find the hub assembly for your Fleetwood pop-up camper. It doesn't take someone with an advanced degree or anything it's just a bit of a pain in the behind. But it's also necessary, and what you need to do is 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 a digital caliper... view full answer...
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