Mega Brands New Universal Rear Disc Brake Rotor for Taotao Icebear Roketa Jonway Peace Sunny GY6 Engine Scooter Moped Trike Fit 150cc/250cc/300cc Scooter/Moped/Trike GY6 engine Internal diameter: 1.8" External diameter: 7.5" Thickness: 3mm Provide confident braking and safety Please check pictures/dimensions before the purchase or contact us for details All MEGA MOTOR Parts are tested rigorously