so yeah, I upgraded my '01 with the factory sport brakes... I never even thought of the spare tire(did you?).
the factory spare on my '01 is(was) a 14 inch wheel... I had a PS rear blow-out on my way to Propwash( thanks to my pit crew, it was changed in 2 minutes!) later, we decided to mount the donut on the front and it didn't fit!
when you do sport brakes, get the 15 inch donut!