Originally Posted by macdiesel
If you plan to track your I would avoid 15". Might want to think about 16"s at the smallest wheels.
Originally Posted by rangerbay
I would use 16" wheels. 15 would be good for autocross, but you need more tire for racetrack use. There are lots of 16" tires out there.
why not 15s. two responses promoting 16" with no posted reasons.
in terms of race tires, 15" is WAY more common so you have a great selection of tires of many widths to fit any budget.
essentially all 15" wheels will clear the brakes on a 2012. and the wheels and tires are lighter. so, win win in my books.
225/50R15 would be a good size for you and is quite common. It will just fit on a 15x7 wheel, although 7.5 or 8" would be prefered.