Suitable for: Avid-SRAM XO Trail, Elixir 7 Trail, Elixir 9 Trail, Guide Ultimate, Guide RSC, Guide RS, Guide R, and Trail-4-Piston. Made from our high-performance organic composite material for optimal performance in cross-country competitions under extreme conditions. Note: These disc brake pads are only compatible with stainless steel rotors. Two pieces per pack.