Icon
Clear Icon
Search Icon
Clear Icon
Search Icon
Clear Icon
Logo Icon
  • Bikes
  • Parts
  • Apparel
  • Accessories
  • Outlet
  • Inside Specialized
  • Support
  • Logo Icon
    Inside Specialized
    Arrow Back Icon

    Sirrus 4.0

    Icon

    Sirrus 4.0

    Delivery Icon

    We deliver! Just say when and how.

    You have places to go, people to see, and fitness goals to achieve. We get it—life moves pretty fast, so it's a good thing we made Sirrus to help you with all of it. Wherever you're heading, Sirrus will take you there. Sirrus features a super light aluminum alloy and carbon fiber construction, as well as reliable MicroSHIFT components that are built to withstand years of daily abuse on the world's pavement. Powerful hydraulic disc brakes provide reliable stopping power in any condition, and comfortable, ergonomically designed Body Geometry touchpoints are there to take the sting out of longer rides. So, as you push yourself to reach your goals, you'll feel more connected to your bike and know that you have the perfect partner with Sirrus.

    Technical Specifications

    Add Icon

    Frameset

    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

    Suspension

    Fork

    Specialized FACT 9r Carbon Monocoque, flat-mount disc, 12x100mm thru-axle, low rider mounts, Plug + Play fender mounts, Future Shock 1.5

    Cockpit

    Handlebars

    Double-butted alloy, 9-degree backsweep, 31.8mm

    Saddle

    Body Geometry Power Sport, steel rails

    Stem

    Future Stem, Comp

    Tape

    Specialized Body Geometry Contour, lock-on

    SeatPost

    Alloy, 2-bolt, 14mm offset, 27.2mm

    Seat Binder

    Bolt-type, 31.8mm

    Brakes

    Rear Brake

    Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm

    Front Brake

    Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm

    Drivetrain

    Shift Levers

    MicroSHIFT, 10-speed

    Front Derailleur

    MicroSHIFT FD-R522, Band-clamp

    Rear Derailleur

    MicroSHIFT RD-R55S, short cage

    Cassette

    Sunrace CSRS0, 10-speed, 11-28t

    Chain

    KMC, X10, EPT anti-corrosion coating, 10-speed w/ Missing Link™

    Crankset

    Praxis Alba M24, solid forged arms, 6061 outer ring, steel inner ring, 110 BCD, 10-speed

    Chainrings

    48/32T

    Bottom Bracket

    Praxis M24, BSA

    Wheels & Tires

    Front Hub

    Alloy, 6-bolt disc, sealed cartridge bearing, high-low flange, 12x100mm thru-axle, 28h

    Rims

    700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h

    Rear Hub

    Alloy, 6-bolt disc, sealed cartridge bearings, high-low flange, 12x142mm thru-axle, 28h

    Spokes

    Stainless, 14g

    Front Tire

    RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c

    Rear Tire

    RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c

    Inner Tubes

    700x28/38mm, 48mm Presta valve

    Accessories

    Pedals

    Specialized Body Geometry Fitness, platform, plastic

    * Weights based on production painted frames as pictured. Actual weights will vary based on colourway, frame size, and component variation. Specifications are subject to change without notice.

    Geometry

    Add Icon
    XXSXSSMLXL
    Crank Length165mm165mm170mm172.5mm172.5mm175mm
    Handlebar Width580mm580mm600mm600mm620mm620mm
    Stem Length60mm70mm70mm80mm90mm100mm
    Saddle Width155mm155mm155mm143mm143mm143mm
    Seatpost Length300mm300mm350mm350mm400mm400mm
    Stack587mm590mm606mm635mm651mm672mm
    Reach355mm371mm376mm382mm386mm398mm
    Head-Tube Length111mm125mm143mm169mm186mm208mm
    Head-Tube Angle69.5°70°71°71°71°70°
    B-B Height284mm284mm284mm284mm284mm284mm
    B-B Drop70mm70mm70mm70mm70mm70mm
    Trail78mm75mm75mm68mm68mm68mm
    Fork Length (full)395mm395mm395mm395mm395mm395mm
    Fork Rake/Offset51mm51mm51mm51mm51mm51mm
    Front-Center602mm618mm629mm634mm644mm663mm
    Chain-Stay Length440mm440mm440mm440mm440mm440mm
    Wheelbase1033mm1049mm1060mm1065mm1074mm1093mm
    Top-Tube Length (horizontal)529mm549mm559mm573mm581mm599mm
    Bike Stand-Over Height722mm750mm778mm810mm831mm700mm
    Seat-Tube Length360mm395mm440mm470mm510mm530mm
    Seat-Tube Angle73.5°73.5°73.5°73.5°73.5°73.5°
    Geometry

    Rider Reviews

    • 5
    • 2 Reviews

    Great pickup service and enjoying bike so far

    Great pickup service at Planet Cycles in Brisbane and enjoying the bike so far. Just as described.

    Would Recommend?
    Yes!

    Verified Buyer

    Icon

    Name:
    Jamie R.

    Helpful?

    Sirrus

    My wife got a Sirrus back in 2012 when the woman’s version was the Vita. She upgraded to a carbon Sirrus in 2019. When my daughter got hooked on riding the Sirrus was a easy choice. The bike is fun, fast, one might say sporty. We got the sage green color, it’s a beautiful color. I know with proper maintenance this bike will last thousands of miles.

    Would Recommend?
    Yes!

    Verified Buyer

    Icon

    Name:
    Chad M.

    Helpful?