... .Frame: steel, stoving varnish. thickness is 1.0mm,argon-arc welding/CO2 welding. 2.Axle: B/A Axle, British System, BLK/UCP 3 ... brake 4.Bike frame:steel and painting,thicker argon-arc welding or CO2 welding. 5.Tire / Tube :Air tyre of MTB type, E ... 6.Handle Bar / Stem : CP, thickness 1.2mm,argon-arc welding. 7.Chainwheel&Crank: 12"--24T*89, 16"--28T*102, 20 ...