Skip to product information
1 of 7

Specialized Sirrus 4.0 Fitness Road Bike

Specialized Sirrus 4.0 Fitness Road Bike

Regular price $1,279.99
Regular price $1,600.00 Sale price $1,279.99
Sale Sold out
YOU SAVE $320.01
20% OFF


Height (Cm) Size
5'1"-5'4" 49
5'4"-5'6" 52
5'6"-5'9" 54
5'9"-6'0" 56
6'0"-6'3" 58
6'3"-6'6" 61

Need help finding the perfect bike? Text or call Kathleen. 858-943-4229, Monday-Friday 8AM-5PM PST

Shop Specialized Road Bikes


 Shipped Direct to Your Home

Our Platinum Pro Assembly fee of only $89 (reg. $100) will be added at checkout. Your Specialized Bicycle will be built, fine-tuned and expertly packaged by our certified team of bike techs. Your new bike comes 90% built, reassembly is quick and easy with our video guides. Your new bike ships within 3-5 business days.

Pick Up at Bicycle Warehouse

$99 Ready to Ride

Bikes comes 100% built and ready to ride. This fee includes professional assembly & setup, one basic Master Service and free warranty processing. Shipped bikes are not charged this fee.

Bicycle Warehosue now offers optional Route Package Protection. Route Package Protection offers peace of mind for your shipments by providing shipping insurance. This coverage ensures that if your package is lost in transit, stolen, or damaged, you're protected. For a small percentage of the total value of your order, Route will promptly generate a replacement order or issue a refund if you no longer want the items.




View full details

Introducing the Specialized Sirrus 4.0 Fitness Road Bike: Your ticket to adventure, speed, and conquering your fitness quests with style. Life's a whirlwind, but fear not – the Sirrus is your trusty steed built for the fast lane of life. Whether it's chasing dreams or chasing the horizon, the Sirrus has your back... or should we say wheels?

Crafted from the cosmos's finest lightweight aluminum alloy and carbon fiber, this bike practically defies gravity. It's like having a piece of a shooting star beneath you. Those MicroSHIFT components? They're tougher than a superhero's resolve, ready to take on the challenge of your daily grind – literally.

Ever wished your bike had brakes that could rival a superhero's cape-catching abilities? Enter the Sirrus and its hydraulic disc brakes. Rain, shine, or even a surprise puddle showdown, you're covered. And let's talk comfort – because who said fitness had to feel like a medieval torture? Our Body Geometry touchpoints are like a spa day for your ride, soothing away the aches during those longer escapades.

So, as you pedal towards your goals, envision the Sirrus as your trusty sidekick. Ready to cruise, conquer, and connect you to the world around you. Let's ride – the journey and FUN await!


  • Carbon FACT 9 fork delivers comfort and saves nearly 3 pounds (1.2kg) over Sirrus 2.0 model.
  • Through axle hub connection for positive wheel alignment and no rub Disc brakes.
  • Wide range 2x10 MicroShift components for intuitive and precise shifting.



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


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


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


Future Stem, Comp


Specialized Body Geometry Contour, lock-on


Body Geometry Power Sport, steel rails


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

Seat Binder

Bolt-type, 31.8mm

Front Brake

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

Rear Brake

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

Shift Levers

MicroSHIFT, 10-speed

Front Derailleur

MicroSHIFT FD-R522, Band-clamp

Rear Derailleur

MicroSHIFT RD-R55S, short cage


Sunrace CSRS0, 10-speed, 11-32t


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



Bottom Bracket

Praxis M24, BSA


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


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

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

Front Hub

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


Stainless, 14g


Specialized Body Geometry Fitness, platform, plastic


Crank Length 165mm 165mm 170mm 172.5mm 172.5mm 175mm
Handlebar Width 580mm 580mm 600mm 600mm 620mm 620mm
Stem Length 60mm 70mm 70mm 80mm 90mm 100mm
Saddle Width 155mm 155mm 155mm 143mm 143mm 143mm
Seatpost Length 300mm 300mm 350mm 350mm 400mm 400mm
Stack 587mm 590mm 606mm 635mm 651mm 672mm
Reach 355mm 371mm 376mm 382mm 386mm 398mm
Head-Tube Length 111mm 125mm 143mm 169mm 186mm 208mm
Head-Tube Angle 69.5° 70° 70° 71° 71° 71°
B-B Height 284mm 284mm 284mm 284mm 284mm 284mm
B-B Drop 70mm 70mm 70mm 70mm 70mm 70mm
Trail 78mm 75mm 75mm 68mm 68mm 68mm
Fork Length (full) 395mm 395mm 395mm 395mm 395mm 395mm
Fork Rake/Offset 51mm 51mm 51mm 51mm 51mm 51mm
Front-Center 602mm 618mm 629mm 634mm 644mm 663mm
Chain-Stay Length 440mm 440mm 440mm 440mm 440mm 440mm
Wheelbase 1033mm 1049mm 1060mm 1065mm 1074mm 1093mm
Top-Tube Length (horizontal) 529mm 549mm 559mm 573mm 581mm 599mm
Bike Stand-Over Height 700mm 722mm 750mm 778mm 810mm 831mm
Seat-Tube Length 360mm 395mm 440mm 470mm 510mm 530mm
Seat-Tube Angle 73.5° 73.5° 73.5° 73.5° 73.5° 73.5°