Ritchey: Engineered for modern e-bike and performance builds, the Ritchey WCS Logic-E 1.5″ Semi-Integrated ZS Upper Headset delivers a precise, smooth steering interface with clean internal cable management. Built with integrated routing channels and durable sealed bearings, it offers the reliability and sleek front-end aesthetic demanded by today’s advanced frames. Designed to work with any standard stem, it’s a refined, lightweight solution for discerning riders and builders.Features • Integrated cable and wire routing for clean cockpit setups • Compatible with standard stems—no proprietary parts needed • Durable sealed cartridge bearings ensure smooth performance • Low stack height for a sleek, compact front end • Designed specifically for modern e-bike and performance applicationsSpecifications Material: Nylon and glass-fibre composite Stack Height: 22.2 mm Headtube Compatibility: 55/61 mm or 56/62 mm SHIS Standard: ZS55/28.6 (1.5″) – ZS56/28.6 (1.5″) Bearings: 51.85/40 mm (45°/45°) sealed cartridge Weight: 74 g Colour: Black