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1. Rim Size: 12" 14" 16" 18" 20"2. Bike frame: steel and painting, thicker argon-arc welding CO2 welding,1.2mm
3. Bike Fork: steel and painting, CO 2 welding steel
4. Rim: 12"14" 16"18" 20" steel or aluminum or colour
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*89/1628T*102/20"28T*127 CP/ED
8. Crank: CP or ED or UCP
9. Brake: F/R Caliper Brake or R band brake
10. Free wheel: 16T 18T 20T
11. Mudguard: steel, painting or CP
12. Chain: full chain or 9-form chain cover
13. Pedal: plastic
14. Saddle: good leather, common or spring plastic imitation leather
