DUH System - Single Speed Thru-Axle Trail Threaded bottle cage bosses located

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

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

corner stakes or for adding custom-built pieces

5" 650 x 41 Folding 440 60 75 Sidewall 584 / 650b / 27

12mm front and rear thru-axles

DUH System - Single Speed Thru-Axle Trail Threaded bottle cage bosses locatedThe 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.