Shimano br r317 mechanical disc caliper rear is mount silver
Disc brake power for road or cyclo cross bikes without the fuss of hydraulic fluid systems cable operated mechanical disc brake design means that you can upgrade to discs using existing compatible road brake levers or stis adjustable pad clearance for easy set up super lightweight low profile body uses a forged one piece alloy design that increases rigidity and reduces weight long arm design maximises performance for light braking control with new super slr brake levers shim less mounting s