Steel MINI BMX / ROAD BIKE headset Model: VP-H732 Color: BLACK This headset fits 1" threaded forks. The bearing cups are 30.0mm in diameter where they press into the headtube - which means they WILL NOT FIT regular BMX frames. This is a Road Bike headset, which will also work on old school MINI BMX frames. * Material: Steel * Finish: BLACK * Size: For 1" threaded forks (BC1) * Diameter: 30mm bearing cups/27mm crown race, This is known as a "JIS" headset (as opposed to a ISO headset). * Stack Height: 24.5mm + 10.5mm = 35mm * Bearing: Caged: 5/32" X 8 * Cup diameter: 30.0mm * Crown race: 27.0mm * Weight: 126 g