These disc brake pads fit a variety of SRAM and Avid brakes and offer industry leading brake compounds for consistent, confident performance. Jagwire Pro E-Bike pads feature a friction compound developed specifically for the unique needs of pedal-assist E-bikes Tuned to provide more stopping power and durability than typical pads, with consistent modulation and little braking noise Steel backing plate Compatible with SRAM G2 Ultimate, G2 RSC, G2 RS, G2 R; Guide Ultimate, Guide RSC, Guide RS, Guide R; Avid Trail Specifications Backing Plate MaterialSteelCompoundSemi-MetallicDesigned for ebikeYesPad Shape Number58