RX4+ Flatmount Rear +20mm MIN Caliper – Integrated mount design to work with Flatmount Rear Mount forks only, allows the use of a 180mm/160mm rotor dependent upon frame mount type.For use with MINERAL Oil systems only.RX4-SH Caliper - Designed to work with Shimano and Campagnolo dropbar brake systems(Mineral Oil, Shimano recommended for Shimano application, Campagnolo/Magura recommended for Campagnolo)
