Surly Karate Monkey Bike - 27.5" Steel Fools Gold Small. The Karate Monkey features updated progressive trail geometry our custom trumpet tubeset and Surly’s Gnot-Boost rear dropout system. Available in a variety of colors with multiple drivetrain and wheel size configurations.

100% Surly Chromoly steel frame and fork; double-butted main triangle and 44mm headtube

The tubeset uses the same trumpet tubes found on Instigator 2.0 frame

Adjustable rear dropouts with 145mm Gnot-Boost spacing. Works with 142 148 12mm thru as well as 135mm w/ 10/12 washer

Internal dropper seatpost routing with 30.9mm seat tube ID

Clearance for 29 x 2.55 or 27.5 x 3 tires