... ’’Frame: steel, argon-arc welding/co2 welding, 1.0mm, paintingFront fork: steel, argon-arc welding/co2 welding, 1.0mm, paintingHandlebar and stem: CP, argon-arc welding ... cover, 0.3mm,steel,paintingMudguard: 0.3mm,steel,painting,CPChianwheel and Crank: 12"24T×89/1628T×102/20"28T×127 CP ...