1.Size:12" 14" 16" 18" 20"
2.Bike Frame: steel and painting, argon-arc welding or CO2 welding Φ22X0.8-1.5mm     
3.Bike Fork: steel and painting, co2 welding steel /suspension fork Φ22X0.8-1.5mm
4.Crank:one piece crank ,CP or ED or UCP;
5.Part to tighten the seat tube: very easy to assemble and tighten;        
6.Brake: F/R Caliper Brake or R band brake or V brake or foot brake;
7.Handlebar and stem: 4-points handlebar,CP, argon-arc welding Φ22X0.8-1.5mm;
8.Tyre: 12"x1.75,16"x1.75, 20x1.75 or 1.95 2.125 2.4 air tires or EVA tire;
9.Saddle: good leather, common or spring /plastic/imitation leather/ plate PVC 
10.Rim: 12" 14" 16" 18" 20" steel alloy or aluminum or plastic;
11.Chain wheel & crank: 12"24T×89/1628T×102/20"28T×127 CP/ED
12.Flywheel: 16T/18T/20T Brown/Black/CP;
13.Mudguard: plastic,steel ,CP;
14.Chain: full chain or 9-form chain cover;
15.Pedal: plastic, with reflector, without ball, PP/TPE/ALLOY;
16.Paint: painting;
17.Color: red, black, blue, green, yellow etc. any color you like;
18.Attachments:flag, the covers of the wheels, training wheels,tool box, basket;
19.Packing: export standard packing, SKD/CKD/AB, 85%SKD/50%SKD, 1PCS/CTN or 4PCS/CTN

http://gxhcy.en.alibaba.com/
Steven[@]gxhbike.com
Skyp: gxhbike
wechat: at_cxt
QQ:3122468920