Surly

DUH - Single Speed Rear Thru-Axle - 12x148mm

The Surly DUH single-speed rear thru-axle (12x148mm Boost) is a purpose-built axle for riders converting a geared, thru-axle frame to a clean, reliable single-speed setup using the Surly DUH system. It delivers the correct fit and retention for the DUH single-speed hardware so chainline and wheel position stay consistent once the drivetrain is simplified.

• 12x148mm Boost rear fit - Designed for modern Boost rear ends using a 12mm thru-axle
• DUH single-speed compatibility - Works specifically with the Surly DUH single-speed chip and hardware to support a geared-to-single-speed conversion
• Consistent wheel retention - Thru-axle security helps keep the rear wheel firmly located for stable brake rotor alignment and dependable tensioned feel
• Required parts note - Requires the Surly DUH single-speed chip and hardware (FS0268, sold separately); the axle alone does not complete the conversion