Hayes Master Cylinder Assembly for Prime Comp Disc Brake

Replacement master cylinder and lever for DOT Hydra OX Brake. GEN 1.

Very few remaining master cylinder/levers this part has been discontinued by the manufacturer.

–Please consider upgrading your LHRB to the OX Brake PRO V 2.0 unit as it is a fully supported product and is optimized with greater stopping power and piston travel. The system’s greater piston travel makes for easy setup and adjustment.  The OX Brake Pro 2.0 is a mineral oil system and is the strongest left-hand braking option we have tested.