Originally Posted by jaxgtr

30 on the back, and 28 on the front with standard rim brakes calipers. If you pick up some of the calipers that allow for up to a 32, you should be able to fit a 32. Now, the rear 32 could be a little tight based on your rim width and how the tire expands out where it could possibly run the seat tube or the front derailleur. Campy I believe has direct mount rim brakes calipers that will fit a 32