Hope RX2 Brake SHIM Flat Mount Direct No Lever BlkA compact caliper to fit in rear triangles with space constraints 2 piston version of the RX4+ road gravel calipers with similar power Does not include lever but can be paired with road shift brake levers (specific Shimano and SRAM versions available) New bleed nipple design for easier bleeding Includes: caliper and hose fittings only *Rotors and adapters sold separately Mineral oil verion is compatible with: Shimano Dura Ace Di2 R9270 R9170 R9120