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Continue to ChatX21D Rear Rotor - PBC765XL - https://www.electricbikeusa.net/gio-bike-parts-master-catalogue/x21d-rear-rotor-pbc765xl
X21D Rear Rotor - PBC765XL - https://www.electricbikeusa.net/gio-bike-parts-master-catalogue/x21d-rear-rotor-pbc765xl