COMP level components are designed to bring competition worthy components down to a price that everyone can handle. You wont find carbon here, but you will find the kind of performance and reliability you expect from Ritchey.
The Standardized Headset Identification System (S.H.I.S.) creates a common language for describing modern bicycle headsets. The system provides comprehensive and scalable headset fitment information in a standardized format; making it easy to communicate headset requirements based on frame and fork interfaces.
The system addresses the critical interface dimensions required to fit a fork to a frame, as well as bearing location/cup type. To determine fit, four dimensions are needed: (1) stem-clamp diameter of fork, (2) crown-race seat diameter of fork, (3) head-tube top inside diameter, and (4) head-tube bottom inside diameter. Bearing location and cup-type are identified as (a) external cup (EC), (b) semi-integrated or ZeroStack (ZS), or (c) integrated (IS).
Bearing Location / Cup Types
Buy Ritchey Comp Press Fit Semi Integrated Headset from Chain Reaction Cycles, the World’s Largest Online Bike Store.