At the heart of the Cook Bros. Racing threadless headset are two super-smooth, 45x45, sealed bearings. A split aluminum crown race makes installation and removal from forks super easy But there is more! Despite this being a threadless headset with cups, the 45x45 bearings also work in integrated headset applications. Toss the cups, pop the bearings in your new frame, and roll! Features: Integrated headset 6061-T6 aluminum top cap CNC machined Laser etched graphics Star Nut 45x45 angular contact bearings which can also be used as integrated headset without cups This Headset works for both integrated headset compatible frames and the good old tradition frame Specifications: Size: 1-1/8" Weight: -