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:ShimanoXTR M9120; Saint M820, M810; Deore XT M8120, M8020; SLX M7120; ZEE M640; Non-Series MT520, MT420RidereverCargo-X, Attack-XE, Attack-XR, Attack-XS, Attack-XU