... 20" available 3.high quality parts used China children bike Frame Material: Steel.Fork Material: Steel.Rim Material: ... size12 14 16 18 20 inch2colorpink3 frame of kids bike steel and painting, thicker argon-arc welding4 fork ... and painting, CO2 welding steel5 rim of kids bike aluminum6 handlebar and stem ED , argon-arc ... .75,16"x1.95, 20"x1.75 or1.958 chain wheel & crank 12" 24Tx89, 14" 24T×88, 16" ...