People have been using car tires on their motorcycles.I actually talked with a Valkyrie rider yesterday using a car tire on the rear.Said it's the second car tire he's had on it and he got 30k miles on the first one.I wonder if a Size: 205/55ZR17 car tire will fit on the ST? Has anyone ever run a car tire on the rear? I sure would like 30k instead of the 7-8k I get.Anything wrong with using a car tire? It seems like you'd have a much larger contact patch with the car tire.:biker: