For the mountain bike riders looking to get the optimum performance out of an XC bike, look no further than the Cannondale Scalpel. At the heart of this full suspension mountain bike is a super lightweight frame with innovative "FlexPivot" chainstays meaning a horst link isn't required. This not only means that there are no bearings to replace, but also makes the frame even lighter. At the other end, a Lefty Ocho single crown, single leg suspension fork provides 100mm of travel while weighing in as one of the lightest forks on the market. High end componentry then completes the package, with the Hi-Mod versions of the Cannondale Scalpel being equipped with carbon bars, seatposts and wheels, and the best groupset from Shimano, XTR. If you're more of a trail bike rider but want a bike that is ultra light and responsive, the Cannondale Scalpel SE is the bike for you. 120mm of suspension travel front and rear, with a RockShox SID replacing the Lefty makes for a great fun bike that is capable on the descents and rapid to pedal back to the top to go again.