Box Two 1.5 Inch Integrated Headset
The 1.5-inch headset is designed for tapered frames and forks but also includes an adapter which allows you to run a straight 1 1/8-inch fork in a tapered head tube. It has a 45x45 degree upper bearing and a 36x45 degree lower bearing.
Yes this headset comes with a two crown races allowing for compatibility with both 1-1/8" or 1.5 inch steerer-tubes.
No this headset is ONLY compatible with frames with a tapered integrated headtube. (IS 42/52)
Box recommends using a light de-greaser or denatured alcohol to clean the outside of the headset, and strongly recommends that a pressure washer is NOT pointed towards the headset when cleaning.