| Children Bicycle Size | 12" 14" 16"   18" 20" | 
| Children Bicycle Frame | steel and painting,   argon-arc welding or CO2 welding Φ22X0.8-1.5mm | 
| Children Bicycle Fork | steel and painting, co2   welding steel /suspension fork Φ22X0.8-1.5mm | 
| Children Bicycle Crank | one piece crank ,CP or ED or   UCP | 
| Children Bicycle Brake | F/R Caliper Brake or R band   brake or V brake or foot brake | 
| Children Bicycle Handlebar   and stem | 4-points handlebar,CP,   argon-arc welding Φ22X0.8-1.5mm | 
| Children Bicycle Tyre | 12"x1.75,16"x1.75,   20x1.75 or 1.95 2.125 2.4 air tires or EVA tire | 
| Children Bicycle Saddle | good leather, common or   spring /plastic/imitation leather/ plate PVC | 
| Children Bicycle Rim | 12" 14" 16"   18" 20" steel alloy or aluminum or plastic | 
| Children Bicycle Chain wheel   & crank | 12"24T×89/1628T×102/20"28T×127   CP/ED | 
| Children Bicycle Attachments | the cover of   wheels,basket,training wheels,according to your requirement. |