The Sirrus X 3.0 Step-Through EQ offers an unparalleled blend of comfort, efficiency, and nimble handling, excelling on asphalt, gravel, and everything in between. SMOOTH; COMFORTABLE AND EFFICIENT: The Sirrus X is known for its class-leading stability. It features larger, confidence-inspiring tires, an upright riding position, and an intuitively designed single-chainring drivetrain. RIDER-FIRST ENGINEERED™: At Specialized Bikes, each frame size and geometry is individually designed rather than simply scaled down. For every size, tube lengths and diameters are optimized for the best balance of stability, weight, and responsiveness. The goal? No matter what frame size you ride, we ensure you experience the best ride feel in the world. AGILE: The lightweight design, outstanding pedaling efficiency, and steering precision come together for a confident, almost telepathic riding experience.