2021 Specialized Sirrus 4.0

Modest component level carbon frame hybrid bike

View on www.specialized.com

2021 Specialized Sirrus 4.0
  • MSRP $1,250
  • Suspension Rigid
  • Frame Carbon
  • Fork Carbon
  • Wheels 700c
  • Drivetrain 2 × 9
  • Groupset Sora
  • Brakes Hydraulic Disc

Where to Buy


2 × 9 — 18 speed

2021 Specialized Sirrus 4.0
34 mph
Similar Bikes
35 mph

The 2021 Sirrus 4.0 is geared about the same as similar bikes for riding up hills.

The 2021 Sirrus 4.0 is geared about the same as similar bikes for riding downhill.

Estimated Spec Level

Estimated spec level of the Sirrus 4.0 compared to other hybrid bikes. 99 Spokes analyzes the build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more to estimate the overall spec level of each bike.

Learn more

est. spec level →$0$200$400$600$800$1,000$1,200$1,400$1,600
This bike
Other hybrid bikes



FrameSpecialized FACT 9r carbon, Fitness Geometry, 12x142mm thru-axle, internal cable routing, flat-mount disc, Plug + Play fender mounts
ForkSpecialized FACT carbon, 12x100mm thru-axle, flat-mount disc, Plug + Play fender mounts
Bottom BracketBSA for 24mm spindle
StemSpecialized, 3D-forged alloy, 4-bolt, 7-degree rise
HandlebarDouble-butted alloy, 9-degree backsweep, 31.8mm
SaddleSpecialized Power, hollow steel rails, 155/143mm
SeatpostAlloy, 12mm offset, 2-bolt clamp, 27.2mm
PedalsSpecialized Body Geometry Fitness, platform, plastic
Rear DerailleurShimano Sora, 9-speed
Front DerailleurmicroSHIFT R9, 9-speed, 31.8mm clamp
Crank2-piece, forged arms, 24mm spindle, steel chainrings w/ chainguard, 48/32T
ShiftersmicroSHIFT, 9-speed
CassetteShimano Sora, 9-speed, 11-34t
ChainKMC X9, 9-speed w/ Missing Link™
BrakesTektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm
Rims700C disc, double-wall alloy, 22mm depth, 21mm internal width, 28h
SpokesStainless, 14g
Front HubAlloy, 6-bolt disc, sealed cartridge bearing, high-low flange, 12x100mm thru-axle, 28h
Rear HubAlloy, 6-bolt disc, sealed cartridge bearings, high-low flange, 12x142mm thru-axle, 28h
TiresRoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c
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2021 Specialized Sirrus 4.0