I've got 20-1/2" tall tires, most are a smaller diameter than that. Those little guys are spinning at a very high rpm compared to the vehicles wheels. I'm planning on attending an event that is going to be 2000 miles away, so 4k round trip. I will be purchasing a complete spare hub assembly, and another spare tire for that trip. Maybe even a set of bearings and seals. Just in case. Changing out a hub on the side of the road sucks, but even more so if you don't have a way to repair it yourself when you're in the middle of nowhere at 3am on a Sunday.