A.
anwered by: canteau
The Tapered ZS Angleset is designed for a 44mm upper headtube that tapers to 49mm on the bottom of the headtube.
The standard tapered is designed for headtubes that are 44mm at the top and 56mm at the bottom.
The OnePointFive version uses 49mm cups for both the upper and lower cups
Cane Creek Anglesets do require the use of a standard 1-1/8 fork.