1. Rim Size : from 12'' 14''  16'' 18'' 20''2. Bike Frame : steel and painting.thicker argon-arc welding/co2 welding3. Bike Fork : steel and 2 welding steel/suspension fork4. Rim : 12'' 14'' 16'' 18'' 20''5. Handlebar and stem : CP. argon-arc welding 22*0.8-1.2mm6. Tyre : 12''*1.75  16''*1.75  20''*1.75 or 1.95  2.125 air tires or EVA tire7. Chain wheel/crank : 12''24T*89  16''28T*102  20''28T*127 CP/ED8. Ceank : CP or ED or UCP9. Brake : F/R Caliper Brake or R band brake10. Flywheel : 16T/18T/20T Brown/Black/CP11. Mudguard : steel.painting or CP12. Chain : full chain or 9-form chain cover13. Pedal : plastic.with reflector.without ball.PP/TPE/ALLOY14. Saddle : good mon or spring/plastic/imitation leather/plate PVC TOP15. Grips : PVC/TPR/RUBBER FOAM16. B.Bparts : 3pcs B.B axle B.B cup17. paint: 3×/4× painting18. Color : red.black.blue.green.yellow etc.any color you like19. Attachments:bag.helmet.flag.the covers of the wheels.training wheels20. Packing : export standard packing SKD/CKD/AB 85%SKD/50%SKD 1 PCS/CTN or 4PCS/CTN21. Green paint is good for health22. We can manufacture the bag.the helmet and the cover of the wheels to match the bikes23. Can make the new sticker according to customers' demands