... .12-20" 2.CCC certificate, OEM accepted 3. delivery: 30days Most popular 12 inch kids bike 1. high quality 2. competitive price ... kids bike descriptionsize of kids bike12", 14", 16",18",20"color of kids bikered, blue, yellow, black, pink, purple and so ... FOAMB.B parts3 pcs B.B axle B.B cup Most popular 12 inch kids bike