Surly

DUH System - Geared Chips, UDH and Hardware

The Surly DUH System - Geared Chips, UDH and Hardware kit is a complete dropout and hanger solution for Surly frames that use the DUH (Droppable Universal Hanger) interface and are being set up with a geared drivetrain. By bundling both drive-side and non-drive-side geared chips with the required hardware and a UDH (Universal Derailleur Hanger), it streamlines service, replacement, and drivetrain compatibility in one focused package.

• Complete geared DUH setup - Includes drive-side and non-drive-side geared chips plus hardware to build a full geared dropout configuration
• Included UDH hanger - Uses the Universal Derailleur Hanger standard for straightforward hanger replacement and broad drivetrain compatibility
• Service-ready kit - Ideal for replacing damaged dropout parts or converting an existing DUH-equipped frame to a geared configuration without piecing together small parts
• Axle requirement (sold separately) - Requires a 12mm thru-axle, 175mm length, 1.0 thread pitch to complete the setup