... arc welding/ CO2 welding 3. Handlebar: steel by painting and covered by grip 4. Pedal: plastic,with reflactor, ... full cover or 6 form cover 6. Fork: steel and painting 7. B.B.axle: CP ,UCP, ED 8 ... 75 ,16"x1.75, 20"x1.75 or EVA tyre 13. Rim: 12" 16" 20" steel alloy or aluminum 14. ... different toy bicycle, tube and tyre, axle series,handle bar,bell,saddle,pedal,bar end,rim,freewheel,crank,head parts,bb ...