Specialized 21 Sirrus X 2.0


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. We've also equipped every Sirrus X with next-level comfort from our scientifically tested and ergonomically engineered Shared Platform Body Geometry saddle, handgrips, and pedals.


  • Lightweight A1 Alloy frame with clean internal cable routing, 3.5lbs (1.7kg) lighter than our Crosstrail Hydro model.
  • Maxiumum control through hyper intuitive shifting with 1x8 wide range gearing, and powerful hydraulic disc brakes.
  • Float over rough stuff with fast rolling Specialized Pathfinder 42c tires featuring proprietary Gripton rubber compound.





FRAME - Specialized A1 Premium Aluminum, Fitness Geometry, butted tubing, internal cable routing, flat-mount disc, quick-release, Plug + Play rack/fender mounts
FORK - Hi-Ten steel, flat-mount disc, Plug + Play fender mounts, low rider rack mounts, quick-release
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
RIMS - 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h
INNER TUBES - Schrader valve, 40mm
FRONT TYRE - Pathfinder Sport, 700x42mm
REAR TYRE - Pathfinder Sport, 700x42mm
CRANKSET - 3 pc, Alloy Forged Arms
CHAINRINGS - 40T, Narrow-wide Steel
BOTTOM BRACKET - BSA, square-taper, 68mm
REAR DERAILLEUR - MicroSHIFT Advent 8 Speed, W/O Clutch
CASSETTE - MicroSHIFT, 8-Speed, 12-42t
CHAIN - KMC X8 w/ Missing Link™
FRONT BRAKE - Promax F1, hydraulic disc, flat-mount, 160mm
REAR BRAKE - Promax F1, hydraulic disc, flat-mount, 160mm
HANDLEBARS - Stout Mini Rise, alloy, 9-degree backsweep, 15mm rise, 31.8mm
TAPE - Specialized Neutralizer, Body Geometry, locking grip
STEM - Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
SADDLE - Bridge Sport, Steel rails, 155/143mm
SEATPOST - Alloy, 12mm offset, 2-bolt clamp, 27.2mm
SEAT BINDER - Specialized bolt-type, alloy, 31.8mm
PEDALS - Specialized Body Geometry Fitness, platform, plastic