Ritchey WCS Switch Stem - 31.8mm Clamp, 110mm, BlackThe WCS Switch stem was designed to stealthily conceal cables into the headset and frame. Up to three cables such as for the rear brake, shifter, electronic drivetrain or even dropper post are effortlessly integrated with the Ritchey Switch System spacers and Switch headset (both sold separately) to cleanly route the hidden cables into the frame. The Ritchey Switch System is an innovative integrated system designed to easily conceal internally routed