phase 1 N15 1.4 brakes are 237mm discs/calipers and fit under 13" wheels, phase 1 N15 1.6 brakes are 247mm and fit under 14" wheels. N15 GTI brakes are 257mm discs/calipers and fit under some 14" wheela I think. Phase 2 N15 1.4 and 1.6 brakes are all 247mm discs/calipers, but if it's an Abs model you can't get performance pads for the calipera.