Detailed Product Description children bicycle JK910-201.frame&fork:all steel2.handlebar&stem:cruise type handlebar steel,alloy head stem3.chain:KMC C4104.rim:alloy rim5.brake:front use side pull brake,rear use side pull and coaster brake6.tire&tube:20"*2.125,MTB type,butyl tube7.color to order***according to your sales market,we can adjust our spec.