The Ritchey WCS Logic Upper Headset Assembly ZS44/28.6 for 1 1/8" steerers is a premium-grade component designed to provide smooth, precise steering and optimized durability for high-performance bikes. Part of Ritchey’s WCS (World Championship Series) lineup, this upper headset assembly combines precision bearings, robust cups, and refined machining to deliver dependable performance for road, gravel, cyclocross, and mountain applications. Whether you’re building a new ride or upgrading your headset, this assembly ensures confident handling and low-friction rotation.

At the heart of this assembly are high-quality bearings that spin effortlessly under load while resisting contamination from dirt and moisture. The ZS44/28.6 designation indicates zero-stack (press-fit) cups for a 44 mm headtube with a 28.6 mm fork steer tube — a common configuration on modern frames. Ritchey’s attention to tolerance control and surface finish ensures that the bearings and cups interface smoothly, promoting long service life and a refined steering feel without creaks or drag.

Constructed from lightweight yet durable materials, the upper headset assembly is engineered to withstand regular use and the demands of varied terrain. Installation is straightforward with standard press-fit tooling and compatible with Ritchey lower headset components or other ZS44/28.6 setups. Finished with subtle styling that complements both classic and contemporary bikes, the Ritchey WCS Logic Upper Headset Assembly brings performance and reliability to your cockpit’s most critical junction.