The XC world is on notice. Look has combined the pure efficiency of a hardtail with the wonderfully compliant and super-light ride of carbon in their 987. It's one of the fastest frames you'll ride, plus, with their E Post and its rider-tuned elastomers, it makes one of the smoothest hardtails around, too. It's designed for 27.5-inch (650B) wheels, which give it the flickability of their 26-inch cousins and the increased roll-over capability of 29-inch wheels. Notice the gusset at the head tube that reinforces the front end for top-notch durability and awesome steering on even the roughest terrain. You'll also appreciate that the frame geometry is tuned for an 80mm- to 90mm-travel fork (forks sold separately) giving you the option of either a full-on race-ready rocket or more of an all-day machine. Plus, the 987 comes with Look's beautiful A-stem integrated stem. Build this rig up and you won't be sorry. Your competition may be, though.