Offering 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 uniquely crafted. This means that for every frame, each tube size is specifically selected to achieve the optimal balance of rigidity, weight, and responsiveness to ensure that no matter what size you’re riding, you will experience the world’s best ride. NIMBLE: Class-leading light-weight, exceptional pedaling efficiency, and steering precision merge for confident, nearly telepathic handling characteristics.
Frameset
Frame: Specialized A1 Premium Aluminum, Fitness Geometry, butted tubing, internal cable routing, flat-mount disc, quick-release, Plug + Play rack/fender mounts
Fork: A1 Premium Aluminum, flat-mount disc, Plug + Play fender mounts, low rider rack mounts, quick-release
Brakes
Front Brake: Tektro HD-R280, hydraulic disc, 160mm rotor
Rear Brake: Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm
Drivetrain
Chainring: 40T
Cassette: microSHIFT Advent, 9-speed, 11-46t
Crankset: Forged aluminum arms, 24mm spindle, narrow-wide steel chainring (40T), chainguard
Chain: KMC X9, 9-speed w/ Missing Link™
Shift Levers: microSHIFT SL-M9295-R, 9-speed
Bottom Bracket: Threaded BSA 68mm
Rear Derailleur: microSHIFT Advent RD-M6195M, 9-speed
Wheels & Tires
Rims: 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h
Front Hub: Alloy, 6-bolt disc, loose ball bearing, quick-release, 32h
Rear Hub: Alloy, 6-bolt disc, 8-/9-speed freehub, loose ball bearing, quick-release, 32h
Spokes: Stainless, 14g
Front Tire: Pathfinder Sport, 700x42
Rear Tire: Pathfinder Sport, 700x42
Inner Tubes: Presta, 700x32-50mm
