The Shimano S-PHYRE RC903 is the improved version of the well-known RC902 and, as such, the ultimate racing shoe that is characterised by a superior fit and optimal power transfer. Innovation is the main priority in this shoe, so this version has been further optimised for maximum performance! The focus has been on three design aspects of this high-performance product: function-specific zones, power transfer optimisation and a perfect fit. There is plenty of reason why so many riders on pro teams choose the Shimano RC903!