Shimano dura ace br 9000 r55c4 brake blocksalways use shimano brake shoes to ensure top brake performance and to maintain the safety of your shimano brake system shimano brake pads provide the ideal hardness for high stopping power combined with great levels of control the r55c4 compound of the brake pads ensures great braking performance in both dry and wet conditions it offers excellent wear resistance suitable for shimano standard road caliper brakes and for use with aluminium rims featu