The Alcon LC300 brake kit is specified with 365 x 36mm rotors for use with 18-inch wheels. Supplied as a rotor kit targeted at 18in wheel applications, it provides the larger rotor diameter and thickness required by systems that call for this LC300 configuration. The description identifies the rotor dimensions and wheel compatibility to aid selection for brake packages designed around 18-inch wheels.
Alcon LC300 Brake Kit - 365X36mm Rotors/18in Wheel