Frame: 12 in. BMX S-Type , Hi-tensile steel. Sizes: 9 in.. Fork: Hi-ten steel. Crank set: One piece steel chrome chain rings 28T. Freewheel: Sprocket 18T. Chains: Heavy duty brown. Brakes: Coaster brakes. Handle Bars: BMX ‘Box’ bars. Stem: Chrome steel. Seat post: Steel chrome. Hubs: Coaster brakes 20H. Spokes: Chrome steel 14G. Rims: Chrome steel front and rear. Black wall tires. Bicycle for boys. Equipped with flashy streamers and wheel disks for added punch. Training wheels will keep the shinny side up. CPSC approved chain guard will keep knickers out of the chain. Recommended age: Kids. Made from steel. Made in China. Rims: 12 in. L x 1.75 in. W x 20 in. H. Tires: 12 in. Dia. x 1.75 in. H. Overall: 18 in. L x 7 in. W x 36 in. H.