SK2 has a directional aluminum carrier, which is 9% lighter than the previous one, a new profile for its outer ring thanks to cooperating with the strongest teams in the world, and a directional seat with a 14? angle Provides FAST reaction and the best lever feel during racing conditions Precise direction of rotation designed to permit better ventilation capability, maintaining the coolest temperature possible during aggressive use. ROTOR BRAKNG ST WK090L