DUH System - Single Speed Thru-Axle Trail Custom dropouts ready to run

Custom dropouts ready to run single-speed or internally geared hub setups

To offer the best rider experience for every frame size

Threaded bottle cage bosses located at the rear of each rail provide mounting locations for accessories: bottle cages

corner stakes or for adding custom-built pieces

Customize your Surly or make your shitty non-Surly look like a really bitchin’ Surly

DUH System - Single Speed Thru-Axle Trail Custom dropouts ready to runThe 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.