The ELEVN Tapered integrated BMX headset is specifically designed for frames w/ tapered headtube (1.5 bottom 1-1/8 top).

Integrated Tapered headset alloy 6061 w/ light compressor custom kit w/ ultra smooth sealed bearings.
Each headset includes a 1 1/8 top & 1.5 bottom bearing, fully CNCd alloy top cap, star nut & compression bolt, w/2 7075 alloy fork races One for a 1.5 steer tube lower fork race, & one for a 1 1/8th steer tube lower fork race that allows you to convert the fork to work w/ a 1.5 lower headtube.Either lower race requires you to use the 1.5 lower bearing that comes w/ the headset.