Chris King's InSet Headset series is designed for very specific applications, which is why you'll find numbers 1 through 8 attached to each one. The InSet 7 seen here includes a 44mm internal, zero stack upper cup paired with a 44mm external lower cup. This means that if you have a straight, 44mm head tube, and a fork with a 1. 5 to 1. 125in tapered steerer tube, this is the Chris King product for you. Each King headset is warranted for ten years, spins on King's house made, ultra smooth bearings, and comes in a variety of color options. It's the perfect finishing touch for your bike, no matter what kind of bike it is.