Sirrus X 1.0 chain guides & tensioners 100x12mm & 142x12mm

100x12mm & 142x12mm

Plush Mid-Density EVA foam and nylon fiber composite base with D2 Edge Flex that provide softened edges for optimal pedal strokes

mated to a carbon fiber backplate

with hard zones for speed and soft zones for torque transfer

Sirrus X 1.0 chain guides & tensioners 100x12mm & 142x12mmOffering 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