Diamondback Mission Pro 27. 5 2015Five minutes on the Diamondback Mission Pro 27. 5 and youll feel like nothing short of an elite rider. Packing 160mm of point-and-shoot full suspension travel, this 27. 5” wheeled all-mountain bike wants to tear into rough, steep terrain, looking for hits and drops that would surely have the amateurs searching for a B-line. Crushing it downhill is one thing, but the aspiring enduro racer needs to be able to climb efficiently too. Not a problem for the Mission Pro! The Fox CTD equipped Knucklebox Migration suspension design reduces pedal induced motion without compromising small bump compliance, delivering you to the top efficiently and comfortably so you have more energy for another rip back down. The Mission takes advantage of the growing popularity of the 27. 5" wheel size with this latest version, offering a ride that splits the difference of 29" and 26" wheels, giving you the best of both worlds. With 27. 5", you retain the snappy handling of 26" wheels combined with the added obstacle clearance and acceleration typical of the 29er platform. We are now in the era of KnuckleBox Migration. 5” wheels. 5. 5 x 2. 5×2.