1. Rim Size : from 12'' 14''  16'' 18'' 20'' 2. Bike Frame : steel and painting.thicker argon-arc welding/co2 welding 3. Bike Fork : steel and 2 welding steel/suspension fork 4. Rim : 12'' 14'' 16'' 18'' 20'' 5. Handlebar and stem : CP. argon-arc welding 22*0.8-1.2mm 6. Tyre : 12''*1.75  16''*1.75  20''*1.75 or 1.95  2.125 air tires or EVA tire 7. Chain wheel/crank : 12''24T*89  16''28T*102  20''28T*127 CP/ED 8. Ceank : CP or ED or UCP 9. Brake : F/R Caliper Brake or R band brake 10. Flywheel : 16T/18T/20T Brown/Black/CP 11. Mudguard : steel.painting or CP 12. Chain : full chain or 9-form chain cover 13. Pedal : plastic.with reflector.without ball.PP/TPE/ALLOY 14. Saddle : good mon or spring/plastic/imitation leather/plate PVC TOP 15. Grips : PVC/TPR/RUBBER FOAM 16. B.Bparts : 3pcs B.B axle B.B cup 17. paint: 3×/4× painting 18. Color : red.black.blue.green.yellow etc.any color you like19. Attachments:bag.helmet.flag.the covers of the wheels.training wheels 20. Packing : export standard packing SKD/CKD/AB 85%SKD/50%SKD 1 PCS/CTN or 4PCS/CTN 21. Green paint is good for health 22. We can manufacture the bag.the helmet and the cover of the wheels to match the bikes 23. Can make the new sticker according to customers' demands