shimano br-r317 is mount rear calliper without rotor

Disc brake power for road or cyclo cross bikes without the fuss of hydraulic fluid systems.Features:Cable operated mechanical disc brake design means that you can upgrade to discs using existing compatible road brake levers or stisAdjustable pad clearance for easy set upSuper lightweight low profile body uses a forged one piece alloy design that increases rigidity and reduces weightLong arm design maximises performance for light braking control with new super slr brake leversShim-less mounting system for quick and easy setupPost type calliper can be adapted to international standard mount frames and forks with various rotor sizesCan be used with centre-lock and 6-bolt rotorsCalliper comes with resin g01s disc pads