About Hayes Stroker Ryde Brake: Radial design, cast aluminum master-cylinder with integrated reservoir and a die-cast aluminum lever blade with 2.5mm reach adjust. Symmetrical, flip-flop lever design with removable bar clamp. Cast aluminum caliper with insulated pistons and an open back design with a pin/clip/magnet pad retention system. Works with Hayes 74mm adapters: front or rear (sold separately). Includes: pre-bled Kevlar wrap hose kit, MC/lever assembly, 74mm caliper with semi-metallic pads, 6-bolt/44mm-BCD rotor, mounting bolts, and manual.