EBC XC Series Contour Brake Rotor mc_mx_boots Great low profile design makes for Part Number:1004 3601 (MFG #: 125 4240U4) Great low profile design makes for safe walking the Podium Black Camo Bag is in first place Keeps the rotor blades perfectly true and flat throughout their life cycle and technically the only reason for a rotor to need replacement will be impact damage or over a very extended number of miles possible rotor wear limits being exceeded The SD System of square sided buttons means that the rotor can expand inwards and outwards unrestrained and that perfect rotor functionality is retained at any speed or load