Sirrus X 5.0 gravel & cyclecross tires and it’s the perfect trail

and it’s the perfect trail partner

but in the sense that you'd love wearing them with or without the nifty pockets

but we also took the tread design of the Fast Trak a step further by manipulating each knob with Finite Element Analysis

Rim Width: 29mm internal

By replacing foam with our Mirror technology

Sirrus X 5.0 gravel & cyclecross tires and it’s the perfect trailOffering 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: The patent pending Compliance Junction frame design of the Sirrus X provides the smoothest ride in its class. Engineered vertical compliance without sacrificing lateral rigidity translates to more comfort, control, and efficiency on all roads, paved or gravel. RIDER