RITCHEY Upper Comp Cartridge Switch Semi-Integrated ZS55/28.6 For 110-120 mm Stem

A key component of the new Ritchey Switch System, Ritchey´s newest headset upper is designed to specifically work with the Ritchey Switch Stem to route cables, wires and hydraulic lines from the handlebar through to the bicycle frame. Cables are routed from the handlebar into the headset conduit, which sits on the underside of the Switch Stem and then travel through an opening on the front of the Switch headset spacers before passing through two channels on the top of the headset and into the frame. This system allows headset bearings to perform without any interference from cables, wires, or lines passing through the headtube. The Switch Headset ships with two Switch Spacers. Additional Switch Spacers are also Important: The length of the headset conduit must match the length of the desired Switch Stem. The Ritchey Switch System is an innovative integrated system designed to easily conceal internally routed cables, wires, and hydraulic lines from the handlebar into bicycle frames with straight 1.5´´ head tubes together with tapered 1-1/8´´ – 1.5´´ forks. The Switch System consists of three elements: Features: - Switch Stem - Switch Headset - Switch Headset Spacers Specifications: - Material Nylon + glass fiber - Stack Height: 21.7mm (IS) or 23.7mm (ZS) - Headtube ID: 52mm (IS) or 55/56 (ZS) - Headtube OD: 56mm (IS) or 61/62 (ZS) - S.H.I.S.: IS52/28.6 (1.5”) – ZS55/28.6 (1.5”) - ZS56/28.6 (1.5”) - Bearings: 51.80/40mm 45°/45° - sealed cartridge (ACB) - Weight: 54g - 5mm x2pc interlocking spacers included