DUH System - Single Speed Thru-Axle

The Surly DUH system single-speed rear axle helps transform your geared bike into a single-speeding machine. You will also need a Surly DUH single-speed chip and hardware (FS0268 - sold separately) to complete the setup. Note: The Surly DUH single-speed thru-axle only works with the DUH single-speed chip and hardware.