The Black Ops DW1.1 Wheelset features 20" sealed bearings double wall rims made of aluminum, designed for a BMX bike. The wheelset includes two Black Ops MX1100 hubs with sealed bearings and a 24mm inner rim width that supports a variety of modern sizes. These wheels are suitable for rim brake bikes with a 3/8 inch axle and Schrader valve type. The doublewall design provides durability and strength for optimal performance on the bike.