... 2, classic design and advanced technology 3, competitive price kids bike size 12" to 20" .children bike1.Size:12 ... "-20"2.Bike frame:steel,stoving varnish ,thicker argon-arc welding/CO2 ... welding,3.Bike from fork or rear fork:steel and painting,argon ... cover:full,type/F,type/P,0.4mm.14.Training wheel/leg:colourful,enhanced type,the leg ...