Sirrus X is your ticket to riding more and to places you never imagined possible. It’s a comfortable capable “let’s do stuff” kind of bike that will inspire you to ride more than you ever have before. With bigger confidence inspiring tires a slightly more upright riding position a super intuitive one-by drivetrain and plenty of mounts for racks and fenders —it’s more than just a solid partner on pavement. Sirrus X is a dialed option when it’s time to hit some gravel. Specialized also equipped every Sirrus X with next-level comfort from our scientifically tested and ergonomically engineered Shared Platform Body Geometry saddle handgrips and pedals. They equipped Sirrus X 4.0 with the revolutionary Future Shock to take the sting out of bumps and potholes. Here’s to your life on two wheels. Future Shock 1.5 delivers 20mm of compliance to give maximum comfort and control over the rough stuff. Added Carbon Fork and an A1 SL alloy frame delivers a build 1.6lb .8kg lighter than the 3.0 model–no heavy hybrid featuring a mountain style suspension fork comes close. Wide-range 1x11 SRAM NX shifting delivers precise shifting for the long haul. Frame Specialized A1 SL Premium Aluminum Fitness Geometry fully manipulated butted tubing internal cable routing flat-mount disc 12x142mm thru-axle 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 Stem Future Stem Comp Tape Specialized Neutralizer Body Geometry locking grip Handlebars Alloy Mini Rise 9-degree backsweep 15mm rise 31.8mm Saddle Bridge Comp Hollow Cr-mo rails 155/143mm SeatPost Alloy 2-bolt 14mm offset 27.2mm Front Brake Tektro HD-R510 hydraulic disc 160mm Seat Binder Bolt-type 31.8mm Rear Brake Tektro HD-R510 hydraulic disc 160mm Shift Levers SRAM NX 11-speed Rear Derailleur SRAM NX 11-speed Cassette SRAM PG-1130 11-speed 11-42t Chain KMC X11 11-speed w/ Missing Link™ Crankset Forged aluminum arms 2-piece 24mm spindle Narrow-wide Aluminum chainring Chainrings 40T Bottom Bracket Threaded BSA 68mm 24mm spindle Rims 700C disc double-wall alloy 22mm depth 21mm internal width 32h Front Hub Alloy Center Lock disc high-low flange sealed cartridge bearings 12x100mm spacing 24H Rear Hub Alloy Center Lock disc high-low flange sealed cartridge bearings 12x142mm spacing 28H Spokes Stainless 14g Front Tire Pathfinder Sport 700x38mm Rear Tire Pathfinder Sport 700x38mm Inner Tubes 700x28/38mm 48mm Presta valve Pedals Specialized Body Geometry Fitness platform plastic