The Sirrus X 2.0 offers an unprecedented combination of comfort, efficiency, and nimble handling, excelling on pavement, dirt, and any terrain in between. With bigger, confidence-inspiring tires, a slightly more upright riding position, and a super intuitive one-by drivetrain, the Sirrus X 2.0 provides the smoothest ride in its class. Like all Specialized performance bikes, the geometry of each frame is uniquely crafted, with each tube size specifically selected to achieve the optimal balance of rigidity, weight, and responsiveness. Class-leading lightweight construction, exceptional pedaling efficiency, and steering precision merge for confident, nearly telepathic handling characteristics. The lightweight A1 Alloy frame features clean internal cable routing and is 3.5lbs (1.7kg) lighter than the Crosstrail Hydro model. Maximum control is achieved through intuitive shifting with 1x8 wide range gearing and powerful hydraulic disc brakes. Fast rolling Specialized Pathfinder 42c tires featuring proprietary Gripton rubber compound help you float over rough terrain.