Sirrus X 2.0 Allez and 700x33mm Tracer Sport tires

and 700x33mm Tracer Sport tires that hookup over nasty terrain

at full gas

but the massive sweat stain on your back says otherwise

When it comes to choosing the perfect pair of bib shorts

Sirrus X 2.0 Allez and 700x33mm Tracer Sport tiresOffering 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