Sirrus X 4.0 Shoe covers the nearest competition

the nearest competition

they seamlessly adapt to your every move

and they're shaped and structured to ensure that their contents won't ever come bouncing out

and integrated thigh pockets

enables over-the-air updates so that your bike gets better over time

Sirrus X 4.0 Shoe covers the nearest competitionOffering an unprecedented combination of comfort, efficiency, and nimble handling, the Sirrus X excels on pavement, dirt, and any terrain in between. SMOOTH; COMFORTABLE, AND EFFICIENT: Sirrus X provides the smoothest ride in its class. With bigger, confidence inspiring tires, a slightly more upright riding position, and a super intuitive one by drivetrain. RIDER FIRST ENGINEERED: Like all Specialized performance bikes, the geometry of each frame is