Hayes Dyno Stroker Ryde Disc Brake Pads, Best Quality MTB Bike Bicycle Replacement Brake Pads By Cooma Provide Quiet Smooth Braking Long Life Kevlar Resin Semi-metallic Replacement brake pads for: Hayes Dyno, Hayes Stroker Ryde TWICE THE LIFE OF NORMAL BRAKE PADS while providing enhanced modulation and shorter break-in time DISSIPATES HEAT and friction up to 600 C degrees with semi-metallic compound for long-term performance for your bicycle trail mtb mountain bike DELIVERS SMOOTH BRAKING, minimal noise and rotor protection with coarse resin blend on a steel backing plate EUROPEAN STANDARD (EN) APPROVED for mountain bicycle safety as tested by TUV Rheinland 14766, 2005