Compatible with Shimano Road Brake Systems. Different compound replaceable rubber pads are available for this titanium finish cartridge system Titanium anodized aluminum cartridge pad holder and brake shoes set Holder is angle adjustable (toe-in) Length: 55mmCompatible with Shimano Road Brake Systems including Dura Ace, Ultegra, 105 SCM including BR-7800 , BR-6600, BR-5600 (R55C2) Superior braking performance Higher Power Excellent wet weather control For replacement rubber pad inserts order OBE-R40R (for normal rims), OBE-R41E (ceramic rim specific) and OBE-R42B (carbon rim specific). Also compatible with OBE-R43P (triple) and other Shimano replacement shoe inserts. Product Code: OBE-R21TR