Offering an unprecedented combination of comfort, efficiency, and nimble handling, the Sirrus X excels on pavement, dirt, and anywhere in between.
Smooth, Comfortable, and Efficient
Experience the smoothest ride in its class. The Sirrus X features larger, confidence-inspiring tires, a slightly more upright riding position, and a super-intuitive 1x drivetrain for effortless pedaling on any terrain.
Rider-First Engineered
Every frame is crafted with Specialized’s Rider-First Engineered geometry. Each tube size is carefully selected to achieve the perfect balance of rigidity, weight, and responsiveness. No matter your size, you’ll enjoy the world’s best ride.
Nimble and Precise
With class-leading lightweight construction, exceptional pedaling efficiency, and precise steering, the Sirrus X offers nearly telepathic handling for confident rides in any condition.
🔧 Technical Specifications
Frameset
Frame: Specialized A1 Premium Aluminum, Fitness Geometry, butted tubing, internal cable routing, flat-mount disc, quick-release, Plug + Play rack/fender mounts
Seat Binder: Bolt-type, 31.8mm
Suspension
Fork: Hi-Ten steel, flat-mount disc, low-rider rack mounts, Plug + Play fender mounts, quick-release
Brakes
Front Brake: Promax F1, hydraulic disc, flat-mount
Rear Brake: Promax F1, hydraulic disc, flat-mount, 160mm
Drivetrain
Shift Levers: Shimano SL-U4000-9R, 9-Speed Rapidfire w/ Optical Gear Display
Rear Derailleur: Shimano RD-U4000, Shadow Design, 9-Speed
Cassette: Shimano Cues, 9-Speed, 11-46T
Chain: KMC eGlide 11-Speed
Crankset: Prowheel Alloy, size-specific (165–175mm), 42T narrow-wide steel chainring
Bottom Bracket: BSA, square-taper, 68mm
Wheels & Tires
Rims: 700C, double-wall alloy, 22mm depth, 21mm inner width, 32h
Front Hub: Alloy, 6-Bolt, loose ball bearing, quick-release, 32h
Rear Hub: Alloy, 6-Bolt, 8-/9-speed freehub, loose ball bearing, quick-release, 32h
Spokes: Stainless, 14g
Front Tire: Pathfinder Wirebead Fast Gravel 700x40C
Rear Tire: Pathfinder Wirebead Fast Gravel 700x40C
Inner Tubes: Standard 40mm SV 700x32–50
Cockpit
Stem: 3D-forged alloy, 31.8mm, 7° rise
Handlebars: Alloy Mini Rise, 9° backsweep, 15mm rise, 31.8mm
Grips: Specialized Neutralizer, Body Geometry, lock-on
Saddle: Bridge Sport, steel rails, 155/143mm
Seatpost: Alloy, 12mm offset, 2-bolt clamp, 27.2mm
Accessories
Pedals: Specialized platform, plastic
