... 2.Steel rim or aluminum alloy rim 3.Size: 16", 18", 20", 24" 4.Color; Red, blue, chrome, ... etc U-18A (18", Double Aluminum rim ) Features: 1) Size: 18" 2) Materials: Double Aluminum rim, ... 3x3/4" in length, steel + ABS 7)Tyre: 18"x1.75, rubber in black or color one 8) Saddle ... 20' FCL, 1432pcs/40' FCL, 1580pcs/40' HQ 18 inch Unicycle with support stand,Double Alum rim(CE certificate)