Thanks for the tip Butch50. I'm still trying to figure out how to get the tire up and down from the roof. I took a look at the photo thread and there are some great solutions in several threads. I've also looked at ladder rack bike carriers so that I could put the spare up front, but that would prevent me from gaining roof access. I would have to take down bikes and rack to get up on the roof of the camper. Plus the bike racks I've looked at I don't know if I would trust them with the amount of money I have invested in mtn bikes.