Sirrus X 1.0 chain guides & tensioners with hard zones for speed

with hard zones for speed and soft zones for torque transfer

The Fidlock magnetic buckle allows quick and easy fastening

Every width of the EC90 ALX has its own size-specific top section with corresponding cross sectional dimensions

Soft-touch power switch accesses flashing or steady mode

Sirrus X 1.0 chain guides & tensioners with hard zones for speedOffering 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