Shimano ultegra br 6800 r55c4 brake blockssuitable for standard shimano road caliper brakes and for use with aluminium rims featurescompatible with the following shimano models br 6800br 6700br 6600br 6500br 5800br 5700br 5600br 5501br 5500br r650br r600br r561br r560a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products buyshimano componentsfrom chain reaction cycles the worlds largest online bike store