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Continue to ChatBrake Rotor - 4 Bolt 215mm 85mm Brake Disc, Front, XY500UE, XY600UE, Chironex - 90A2085 - PBC770F1 - https://www.electricbikeusa.net/brakes/brake-rotor-4-bolt-215mm-85mm-brake-disc-front-xy500ue-xy600ue-chironex-pbc377yt