Electric-assist bikes have unique needs for braking performance. With additional weight and speed from the motor, E-bikes put significant strain on the brake pads. Pro E-Bike disc brake pads are tuned to provide additional stopping power and durabiility. They also offer consistent modulation with little braking noise. WHEN TO USE: Designed for the unique demands of pedal-assist E-bikes, Pro E-Bike pads are perfect for both city E-bikes and E-MTBs.Compatibility: SRAM® G2 Ultimate, G2 RSC, G2 RS, G2 R; Guide Ultimate, Guide RSC, Guide RS, Guide R; Avid® Trail