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.