City electric bike hub brushless motors Disc brake or V brake Shimano external 6 gears lithium battery ... size wallFront Fork: Aluminum alloy suspension fork, ZoomFront Brake: Disc BrakeRear Brake: Disc or V brakeSpeed Gears: SHIMANO 6 speed gearsDerailleur: ... Aluminum alloySaddle: Soft confortablePedeal: City style pedal, VPOptional Parts: Front/ Rear Light, Tool Kit, Rack Bag, Helmet Electric bike ...