1.frame: steel,painting,argon welding or co2 welding.
2.fork: steel,argon welding or co2 welding.
3.rim: steel or aluminum
4.brake: F/R  caliper brake or R band  brake
5.tyre: 12"*1.75,  16*1.75* ,20*1.75/1.95/2.15
6.tube: air or EVA
7.free wheel: 16T /18T /20T
8.chainwheel &crank: 12" 24T*89 ,16"28T*102 ,   20"28T*127
9.pedal: plastic with reflector or without refletor
10.saddle: leather,spring ,plastic or imitation leather
11.B.B parts: B type.3pcs
12.hand bar: Steel,CP
13:mudguard: steel,painting or CP.
14.grip: PVC/rubber foam
15.carriers: steel,with or without tool box
16.packing: 85%skd     50% SKD  CKD ,1pcs/cartoon ,A/B carton , or 4pcs/carton