The SRAM HS2 6 Bolt Disc Rotor is an excellent upgrade for mountain bikes. It features a smooth, rounded edge approved by the UCI, making installation straightforward. The brake surface is designed for a quiet experience while maintaining smooth and consistent operation. Made from lightweight steel at 2mm thick, the HS2's design offers a powerful yet lighter rotor with superior heat dissipation, ensuring exceptional braking power and performance for extended periods.