Suitable for: Hayes Mechanical, SOLE hydraulic, MX2, MX3, MX4, MX5, GX2, Sole mechanical, CX pro.comp.expert, Cannondale Helix 6, Bengal ares, MB series, Strida, Helix 5, Helix 7, Helix 7L, and Helix 7.5. Made from our high-performance organic composite material, designed for optimal performance in cross-country races under extreme conditions. Note: These disc brake pads are only compatible with stainless steel rotors. Package contains 2 pieces.