Surly DUH System - Single Speed Chip and Hardware CheckoutSpec= Core Black/Carbon/Gum 5 Roval Rapide Aero Carbon Wheels:

Roval Rapide Aero Carbon Wheels: True pro-level aerodynamics and performance

} BB DUB PressFit 30 Ceramic (Road) 79mm or BBRight

we didnt spend a single extra gram to get mega capability from the frame

and packs down to nearly nothing

Surly DUH System - Single Speed Chip and Hardware CheckoutSpec= Core Black/Carbon/Gum 5 Roval Rapide Aero Carbon Wheels:Includes a Surly DUH system single speed chip and hardware to transform a geared bike into a single speeding machine. You will also need a Surly DUH single speed rear thru axle (FS0270 sold separately) to complete the setup. Note: The Surly DUH single speed chip and hardware only work with the Surly DUH single speed thru axle.