1. new model children bicycle, one wheel 2.Steel rim or aluminum alloy rim 3 ... ", 18", 20", 24" 4.Color; Red, blue..... New model children bicycle, 16",18",20",24" unicycleModel No.: U-16A (16", Aluminum ... finish 4)Hub: Electro-plated or painted finish, ball-bearing 5) Crank: Electro-plated steel 6)Pedal: 3x3/4" in ... FCL, 1572s/40' FCL, 1734pcs/40' HQ new model children bicycle 16' 18' 20' 24' unicycle ...