The Shimano SM-MA-F203S/S adapter allows the installation of Shimano IS2000-Standard caliper on forks with IS2000-Standard direct style in conjunction with 203 mm rotors. Product features - Shimano SM-MA-F203S/S Fork type: IS2000-Standard Caliper type: IS2000-Standard Rotor diameter: 203mm Material Adapter: Aluminium Screws: Steel