Smoother is faster. The more comfortable and less fatigued you are at the end of a multi-hour ride, the stronger you'll be. Thanks to Specialized's FACT carbon frameset and its vibration-damping Zertz inserts, the S-Works Roubaix SL4 lets you ride farther and faster! The feathery Roval Rapide CLX 40 carbon wheels soar up the climbs, and provide stable, confident handling on descents. The bike is equipped with Shimano's hallmark 11-speed Dura-Ace, which boasts lightning fast shifting, along with remarkably light action. Plus, Specialized's Body Geometry saddle, S-Works CG-R carbon seatpost, and excellent components invite you to add more miles to every ride.