Materials - Compressive four-way stretch fabric
it's important to capitalize on years of R&D and pro rider feedback to create the fastest time trial bike—for all courses
700 nodes and features a unique concave shell to deliver our thickest Mirror pad yet
because we know light weight is a key ingredient to creating magical ride quality
Six distinct geometry settings allow you to hone performance for any style
Sirrus X 4.0 Gravel Materials - Compressive four-way stretchOffering 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