Shimano sora r317 mechanical disc brake caliperenjoy reliable braking power thanks to this shimano disc brake caliper'. '.strtoupper('d')esigned for use with road or cyclocross cx bikes, it benefits from a lightweight low profile and is suitable for use with post mount framesets'. '.strtoupper('b')enefiting from a forged alloy construction, this cable operated disc brake features adjustable pad clearance for an easy set up and can be adapted to international standard mount frames and forks with various rotor sizes.featuresbrake mount post mountbrake type cable disc brakecompatibility can be used with centre lock and 6 bolt rotorsdisc pads included caliper comes with resin g01s disc padshydraulic or mechanical mechanical disc brakesingle or pair pairpart no br r317a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.