SHIMANO R55C brake cork pads Made for BR79，78，67，66，56，55 series Can be used for ROAD system. Standart dimensions - many brake use the same. one braking material， one type of braking surface， "Quercus suber" = Oak Cork tree light， Excellent braking performance for both dry and wet All weather application High static friction coefficient 55 mm long Insert brake pads approx weight: 9g