1. Rim Size: From 12" 16" 20"
2. Bike frame: Steel and painting,
3. Bike Fork: Steel and painting, argon-arc welding
4. Rim: 12" 16"20" steel alloy or aluminum or plastic
5. Handlebar and stem: CP, argon-arc welding Φ 22X0.8-1.2mm
6. Tyre: 12"x1.75, 16"x1.75, 20x1.75 or 1.95 2.125 air tires or EVA tire
7. Chain wheel & crank: 12"28T× 102/16"28T× 110/20"28T× 127 CP/ED
8. Crank: CP or ED or UCP
9. Brake: F/R Caliper Brake or R band brake
10. Freewheel: 16T/18T/20T Brown/Black/CP