I started with a CPP conversion kit from Classic with the small 10.98" rotors and slider calipers and it fit inside my 14" magnum 500 wheels. Later I changed to the 11.75 Córdoba rotors which needed the 15" wheels. Limited choices in 14 & 15" tires. A lot of fellows here go bigger, 17 & 18" wheels. More choices in better tires.