... wheel 2.Steel rim or aluminum alloy rim 3.Size: 16", 18", 20", 24" 4.Color; Red, blue..... New model children ... ",20",24" unicycleModel No.: U-16A (16", Aluminum rim or stell rim) Features: 1) Size: 16" wheel2) Materials: Aluminum or stell rim ... : 3x3/4" in length, steel + ABS 7)Tyre: rubber in black,16" size8) Saddle: Leather with spring 9) Seat post: with electro ...