Rim Size: 12" 16" 20"
Bike frame: Steel and painting, thicker argon-arc welding/CO2 welding
Bike Fork: Steel and painting, CO2 welding steel /suspension fork
Rim: 12" 16" 20" steel alloy or aluminum
Handlebar and stem: CP, argon-arc welding 22X0.8-1.2mm
Tyre: 12"x1.75, 16"x1.75, 20x1.75 or 1.95 2.125 air tires or EVA tire
Chain wheel & crank: 12"24T89/1628T102/20"28T127 CP/ED
Crank: CP or ED or UCP
Brake: F/R Caliper Brake or R band brake
Freewheel: 16T/18T/20T Brown/Black/CP
Mudguard: Steel, painting or CP
Chain: Full chain or 9-form chain cover
Pedal: Plastic, with reflector, without ball, PP/TPE/ALLOY
Saddle: Good leather, common or spring /plastic/imitation leather/ plate PVC TOP
Grips: PVC/TPR/RUBBER FOAM
B. Bparts: 3PCS B. B axle B. B cup
Paint: 3X/4X painting
Color: Red, black, blue, green, yellow etc. Any color you like.