The Trek Supercaliber is one of the most awarded XC race bikes in the World Cup circuit. The secret lies in IsoStrut – a structural, frame-integrated shock developed by RockShox in collaboration with Trek engineers. When you combine this award-winning design with the latest automatic Flight Attendant suspension, you get the ultimate racing package that takes all the thinking out of your ride. No other suspension is so tailored to your riding preferences, terrain, riding style, and physical abilities. Elevate your ride.