Formula R1R R1 R0 RX T1 Mega C1 Replacement brake pads by Cooma provide Noise Control, Smooth Braking and Long Life. Resin, Organic, Semi-Metallic Compatible With Formula Disc Brake Models: R1R, R1, R0, RX, T1, Mega, The One Twice The Life of Other Brake Pads - while providing enhanced modulation and shorter break-in time Dissipates Heat - and friction with semi-metallic compound for long-term performance for your bicycle trail mtb mountain bike 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