RIM AN (AM) 20 451x17 MITE G69 TCS 28 POL/MSWMini BMX race wheel with double wall, tubeless compatible sleeved joint construction. Durable yet light weight G69 6069-T6 alloy construction. Item Specifications: Size, 20in, Width OD, 21, Side, MSW, Drill, 28, ERD, 430, Wall, Dbl, Valve, PV, Model, Mite, Profile, 18, Tire Compatibility, Tubeless Compatible, ISO, 451, Width ID, 17, Brand, Alienation,.