DiscoBrakes Shimano Dura-Ace Ultegra 105 Road Brake Pads for Carbon Rims R55C2 Brand: DiscoBrakes 4 Pairs of Disc Brake Pads (8 pads in total)Will work with any Shimano Brake shoe that has removable shoes that use set screws. 55mm long Also compatible with cartridge brake shoes OBE-R31CP, OBE-R32TP, OBE-R33TR, OBE-R34CR, OBE-R21TR and OBE-R11AR Compatible with Shimano Road Brake Systems including Dura Ace, Ultegra, 105 SCM including BR-7800, BR-7700, BR-6500, BR-6600, BR-5500 and BR-R600 (R55C2) Superior braking performance