2021 Specialized Sirrus 4.0

A 700c carbon frame fitness bike with modest components and hydraulic disc brakes, priced near the middle of the Sirrus model range. Compare the full range

2021 Specialized Sirrus 4.0
MSRP$1,500
SuspensionRigid
FrameCarbon
ForkCarbon
Wheels700c
GroupsetSora, microSHIFT R9

BrakesHydraulic Disc
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Estimated Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$200$400$600$800$1,000$1,200$1,400
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Reviews

May 2022

road.cc
Specialized Sirrus X 3.0

Hybrid do-it-all with a bit of edge and attitude, just as happy around town as it is on the byways

Read Full Review

March 2020

Bicycling
The Specialized Sirrus X 4.0 is One Heck of a Hybrid

Smooth, fast, and utilitarian—this commuter has it all.

Read Full Review

September 2019

BikeRadar
Specialized Sirrus Elite review

A fuss-free commuter with a commanding ride position and a nicely understated style

Read Full Review


Geometry

Sizing
XS

5'2" – 5'6"

SM

5'4" – 5'9"

MD

5'6" – 5'11"

LG

5'9" – 6'2"

XL

6'0" – 6'4"

XXL

6'1" – 6'5"

🐐 Estimated


Specs
Build
Frame

Specialized FACT 9r carbon, Fitness Geometry, 12x142mm thru-axle, internal cable routing, flat-mount disc, Plug + Play fender mounts

BB StandardBSA, threaded

ColorsSatin Flake Silver / Charcoal / Black Reflective; Gloss Uv Lilac / Satin Black Reflective

Fork

Specialized FACT carbon, 12x100mm thru-axle, flat-mount disc, Plug + Play fender mounts

Bottom Bracket

Shimano threaded

Stem

Specialized, 3D-forged alloy, 4-bolt, 7-degree rise

Handlebar

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

Saddle

Body Geometry Power Sport, steel rails

Seatpost

Alloy, 12mm offset, 2-bolt clamp, 27.2mm

Pedals

Specialized Body Geometry Fitness, platform, plastic

Groupset
Rear Derailleur

Shimano Sora, 9-speed

Front Derailleur

microSHIFT R9, 9-speed, 31.8mm clamp

Shifters

microSHIFT, 9-speed

Cassette

Shimano Sora, 9-speed, 11-34t

Chain

KMC X9, 9-speed w/ Missing Link™

Brakes

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

Wheels
Rims

700C disc, double-wall alloy, 22mm depth, 21mm internal width, 28h

Spokes

Stainless, 14g

Front Hub

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

Rear Hub

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

Tires

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

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