Compatible with: Shimano Flat-Mount BR-RS505 BR-R805, BR-R9100, BR-R9170, Ultegra BR-R8070, Ultegra BR-R7070, Metrea U5000, BR-RS405F, BR-RS405R, BR-RS305F, BR-R510, BR-R310, and TT-T910. Made from our high-performance organic composite material, designed for optimal performance in extreme conditions during cross-country competitions. Note: These disc brake pads are only suitable for stainless steel rotors. Pack contains two pieces.