Sirrus X 4.0 Gravel 700 nodes and features a

700 nodes and features a unique concave shell to deliver our thickest Mirror pad yet

tough trail construction with additional bead to bead protection for exceptional puncture resistance

without constricting any upper body movements

it's important to capitalize on years of R&D and pro rider feedback to create the fastest time trial bike—for all courses

11% more efficient and 5% lighter than any other endurance tire on the road*

Sirrus X 4.0 Gravel 700 nodes and features aOffering 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