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: 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-FIRST ENGINEERED: Like all Specialized carbon bikes the geometry of each frame is uniquely crafted. This means that for every frame each tube size and carbon layup is specifically selected to achieve the optimal balance of rigidity weight and responsiveness to ensure that no matter what size you’re riding you’re going to experience the world’s best ride. NIMBLE: Class-leading light-weight exceptional pedaling efficiency and steering precision merge for confident nearly telepathic handling characteristics. Specialized FACT 9r carbon frame features internal cable routing. Using our Rider-First Engineered™ philosophy the geometry of each frame is uniquely crafted. Each tube size and carbon layup is specifically selected to achieve the optimal balance of rigidity weight and responsiveness no matter the frame size. The Compliance Junction provides just the right amount of flex and forgiveness across the carbon frame without sacrificing performance and efficiency. Future Shock 1.5 Specialized’s unique suspension design is placed inside the headtube to prevent harsh frequencies caused by bumps in the road from reaching the handlebars. Wide 38c Pathfinder tubeless-ready tires are ideal for mastering variable terrain providing traction and comfort off the beaten path. The minimalist yet efficient SRAM GX Eagle 1x drivetrain with wide-range gearing ensures smooth and reliable shifting. SRAM S300 hydraulic brakes with 160 Paceline rotors provide reliable stopping power on- and off-road. Sirrus X 6.0 is fender and rack compatible with top tube and fork mounts and racks can be used with 51c DRYTECH fenders making Sirrus easy to rack and roll. Frame Specialized FACT 9r Carbon Fitness Geometry 1x Drivetrain 12x142 thru-axle internal cable routing flat-mount disc Plug + Play rack/fender mounts Fork Specialized FACT 9r Carbon Monocoque flat-mount disc 12x100mm thru-axle low rider mounts Plug + Play fender mounts Future Shock 1.5 Handlebars Double-butted alloy 9-degree backsweep 31.8mm Stem Future Stem Comp Grip Specialized Neutralizer Body Geometry locking grip Saddle Body Geometry Power Sport steel rails SeatPost Roval Terra Carbon Seat Post 20mm Offset Seat Binder Integrated w/ frame Front Brake TRP FMR HD-R803 Rear Brake TRP HD-R803 hydraulic disc Rear Derailleur Shimano Deore Di2 12-Speed RD-M6250-SGS Shift Levers Shimano Deore Di2 SW-M6250-R Cassette Sunrace 12Seed 11-51T Chain KMC X12EPT 12-speed anti-corrosion coating w/ reusable Missing Link™ Crankset Prowheel Alloy XS: 165mm S - M: 170mm L - XXL: 175mm Chainrings Narrow Wide Steel 42T Bottom Bracket BB68+ BSA24 68mm Rims DT Swiss R470 23mm depth 20mm internal width disc brake 24h Front Hub Specialized front hub disc sealed cartridge bearings 12x100mm thru-axle 24h Rear Hub Specialized sealed cartridge bearings 12x142mm thru-axle 24h Spokes Stainless 14g Front Tire Pathfinder TLR Fast Gravel Tire 700x40c GRIPTON T2/T5 Rear Tire Pathfinder TLR Fast Gravel Tire 700x40c GRIPTON T2/T5 Inner Tubes Standard 40mm SV 700x32-50 Pedals VP Platform Alloy Body As with any product specification is subject to change without prior notification. You are advised to confirm current specification before buying. Please note that this bike does not come with pedals.