It is the 180mm version and for 6 bolt hubs. The rotor bolts are included.
Pair of Shimano SM-RT56 disc brake rotors 180 mm 6 bolt (4326)
Sram Centreline 140mm Disc Brake Rotor - Titanium Bolts - 6 Bolt
SRAM Centreline Disc Brake Rotor - 180mm 416-36/430-13
Bicycle Hub Disc Brake Center Lock Adapter Disc Brake Rotor Adaptor for 6 Bolt
