The Karate Monkey Front Suspension bike features a Rock Shox 35 Gold RL A2 suspension fork with 140mm travel, and it's paired with a dropper post out the box. Progressive trail geometry and Surly's Gnot-Boost rear dropout system deliver a versatile bike with the ability to swap hubs and wheel sizes. If you want to round-house kick some trail right in the face, the Karate Monkey is your sled. - 100% Surly Chromoly steel frame, double-butted main triangle and 44mm headtube - The tubeset uses Surly custom trumpet tubes for greater stiffness and durability - Adjustable rear dropouts with 145mm Gnot-Boost spacing. Works with 142 and 148 x 12mm thru, as well as 135mm w/ 10/12 washer - RockShox 35 Gold RL A2 suspension fork with 140mm travel - TranzX YSP15 dropper post with stealth routing; 100mm travel on XS, 120mm travel on SM-XL