I can't imagine that the size of the rim would have anything to do with needing PASM or not. I would assume the non PASM spring rate and shock rate would be very similar if not identicle to the non sport mode on PASM. Wheels should not be a factor as it should ride the same as a car with PASM in the normal mode. I just lowered my car with H&R springs, (07) with PASM, and 19's. It actually makes the car ride a little smoother, or less jittery in normal mode, and tight, but not rough in sport mode. I think with or without PASM you will be just fine.