... ' '20'' 2.Frame :steel ,painting , Children bike1.Item no:12'' 16' '20''2.Frame :steel ,painting ,top tubeΦ1.0mm ... x1.75 20''x1.756.Handlebar:CP.Φ22X1.0mm7Chainwheel&cranks:12''28Tx89 ,16''28Tx102,20''28Tx127,British system 8.Pedal: ... carrier:ED,Φ6.5MM14.Brake lever:plastic15,Packaging size:12'' 74x18x33cm 1x40HQ 1550sets, 16'' 85x18x42cm 1x40HQ 1000sets 20'' 105x18x51cm 1x40HQ 670sets children bicycle