Surly Karate Monkey FramesetThe 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. Frame 4130 Chromoly, Natch tubing, double butted main triangle, trumpet flared tubes, TIG welded, ED coated Fork 4130 Chromoly, Natch tubing, double butted tapered fork blades, TIG welded, ED coated