Detailed Product Description JK913-20 bicycle1.frame&fork:all steel2.handlebar&stem:racing type handlebar,steel and all with grip;steel stem3.chain:KMC C4104.rim:alloy rim5.brake:front and rear use steel side pull,3.5T6.brake lever:alloy lever,Power RBL-750AS7.tire&tube:20"*1.95,butyl tube8.color to order***according to your sales market,we can adjust our spec.