... Steel rim or aluminum alloy rim 3.Size: 16", 18", 20", 24" 4.Color; Red, blue..... New ... model children bicycle, 16",18",20",24" unicycleModel No.: U-16A (16", Aluminum rim or stell rim) ... Features: 1) Size: 16" wheel2) Materials: ... length, steel + ABS 7)Tyre: rubber in black,16" size8) Saddle: Leather with spring 9) Seat ...