8BW 111_z_ BR_h_78_z__z_ arm spring adjusting bolt Shimano Spares Silver One size 4524667215646 Parts 4524667215646 Brakes _and_ Shifters Spares _and_ Brake _and_ Shift Levers br78_z__z_ br 78_z__z_ one size SPRE BR78_z__z_ armSpg adjust bolt Y8BW111_z__z