While fat bikes were a bold jump for mountain bike designers, they were originally designed to conquer the snow. With a lot of people using their fat bikes on summer trails, however, the mountain bike industry has taken notice and done its research. The result is ever increasing rim and tire widths. The FOX 34 Float 27. 5 Plus 140 3Pos Adj FIT 4 Fork is a notable step in this evolution. The Plus means the fork will accommodate a huge tire up to 3. 25 inches on a 27. 5 inch rim. While this isn't the only evolutionary step that this fork represents, it certainly is the most notable. Bear in mind, however, that an upgrade to the FOX Plus fork will require a 110x15mm QR hub and chances are your bike didn't come with one. For 2016, the steerer, crown, uppers, lowers, and Float Air spring all shed weight, so the fork loses a claimed grand total of 219 grams while actually getting stiffer. Of course, weight savings are great on paper, but the fork really makes its bacon by dint of on trail functionality. With the upgrade to the all new Fit4 Damper, the Float 34 is pulling mad pig. The new Fit4's Damper shaft porks out to 10mm for increased oil flow to the base valve, and the fork rides high for quick, controlled recovery during everything from big, square hits to successive, small impacts. The new 3 position Fit4 system also replaces CTD, changing the names from the overly prescriptive categories of Climb, Trail, and Descend to a graduating scale covering Firm, Medium, and Open. While this change may read like an exercise in semantics, it entails a radical realignment of the 34 Float's capabilities that addresses virtually every issue we've had with CTD's damper in the past. The most welcome change is that Fit4 migrates the adjustable sub settings from CTD's median Trail mode to the new Open setting. Open encompasses both Descend and Trail in order to take full advantage of the fork's high ride by handling most compression duties. This makes the fork that much mo...