The Shimano SM-MA90-F160P/S lightweight adapter allows the installation of Shimano Postmount caliper on forks with IS2000-Standard 160 mm direct style in conjunction with 160 mm rotors. Product features - Shimano SM-MA90-F160P/S Fork type: IS2000-Standard (160mm) Caliper type: Postmount Rotor diameter: 160mm Material Adapter: Aluminium Screws: Stainless steel Weight approx. 21g with screws