... , one wheel 2.Steel rim or aluminum alloy rim 3.Size: 16", 18", 20", 24" 4.Color; Red, blue..... New model ... .: U-16A (16", Aluminum rim or stell rim) Features: 1) Size: 16" wheel2) Materials: Aluminum or stell rim, chromed frame (made ... or painted finish 4)Hub: Electro-plated or painted finish, ball-bearing 5) Crank: Electro-plated steel 6)Pedal: 3x3/4" in ...