... 3.timely delivery 4.best service kids bike descriptionsize of kids bike12", 14", 16",18",20"color of kids bikered, blue, yellow, black, pink, purple ... and so onframe of kids bikesteel and ... .95, 20"x1.75 or1.95chain wheel & crank of kids bike12" 24Tx89, 14" 24T×88, 16" 28Tx102, 18' 28T×102, 20" ...