baby bicycle: 1,Rim size: 12'' 16'' 20'' steel alloy and aluminium 2, High quality and competitive ... price 3, Fashional design baby bicycle:1,Rim size: 12'' 16'' 20'' steel alloy and aluminium2, High quality and competitive price3 ... welding 22 × 0.8-1.2mm5, Tyre:12'' × 1.75. 16'' × 1.75, 20'' × 1.75 or 1.95 / 2.125 ...