SIRRUS X 3.0 ST SIZE:XS which leads to power-robbing foot

which leads to power-robbing foot collapse

But our Pro-level saddle features titanium rails and a reclaimed carbon fiber base to bring Mirror technology to more riders on more terrain than ever before

AND EFFICIENT: Sirrus X provides the smoothest ride in its class

derailleur compatible

The Roval Terra seatpost is the best choice for riding mixed terrain

SIRRUS X 3.0 ST SIZE:XS which leads to power-robbing footOffering 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