Which size or configuration labels have geometry for the 2021 Specialized Sirrus 6.0?

Geometry is listed for XS, S, M, L, XL, and XXL.

What are the reach and stack of the 2021 Specialized Sirrus 6.0 in size L?

In size L, reach is 386 mm and stack is 649 mm.

What is the head tube angle of the 2021 Specialized Sirrus 6.0?

The head tube angle is 71.5 degrees in size L.

What does the 2021 Specialized Sirrus 6.0 ship with?

The stock build includes Shimano 105 R7000, Specialized Roubaix Pro 2BR, Shimano MT201, and Specialized Future.

Which years of the Specialized Sirrus are on Quiver?

Quiver has the Specialized Sirrus for 2021, 2023, 2022, 2020, 2019, 2018, 2017, 2015, 2014, 2013, 2012, 2011, 2010, 2009, and 2008.

2021 Specialized Sirrus 6.0 geometry and specs

Key facts

Brand: Specialized
Model: Sirrus
Model year: 2021
Frame: 6.0
Type: Commuter
Geometry labels: XS, S, M, L, XL, and XXL
Drivetrain: Shimano 105 R7000
Geometry: Complete for every size
Source: specialized.com
Checked: Oct 12, 2026

Geometry by size

Geometry drawing, size M, to scale.

2021 Specialized Sirrus 6.0 geometry by size
Measurement	XS	S	M	L	XL	XXL
Reach(mm)	355	371	384	386	398	410
Stack(mm)	585	602	631	649	687	709
Head tube angle(°)	70	70	71	71.5	72	72
Seat tube angle(°)	73.5	73.5	73.5	73.5	73.5	73
Chainstay length(mm)	435	435	435	435	435	435
Wheelbase(mm)	1027	1050	1060	1063	1082	1101
Standover(mm)	714	756	788	813	849	875
Seat tube length(mm)	355	416	453	483	533	563
Fork length(mm)	390	390	390	390	390	390
Head tube length(mm)	125	143	169	186	223	246

How to read a geometry chart

Stock build

10 parts

Drivetrain

Shimano 105 R7000

DerailleurSpeeds 11Actuation type MechanicalMount type braze-on

Shimano 105 R7000 GS

Derailleur

Shimano 105

Cassette

KMC X11

ChainSpeeds 11Links 118

Praxis Alba M30

Crankset

Wheels & Tires

Specialized Roubaix Pro 2BR

Tire

DT Swiss R470

RimInternal width 20mmMaterial AluminumRim depth 23mmWeight 450 g

Brakes

Shimano MT201

Brake

Cockpit

Specialized Future

Stem

Seatpost & Saddle

Specialized Power

Saddle

Keep your Sirrus 6.0 in Quiver

Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.

Free on App Store Free on Google PlayFree for your first bike, on iPhone and Android.

Already have Quiver? Open this build

Sources agreeManufacturer

Keep the factory build and your current parts distinct

Bikes to compare with the Sirrus

Same kind of bike with the closest frame angles and proportions. Differences are how each one compares to this bike.

2019 Specialized Sirrus X Women's Comp Carbon
Close on every number both bikes have.
Compare
2019 Merida SPEEDER
More stretched-out position, steeper head angle.
Compare
2022 Specialized Crossroads 1.0 Step Through
Slacker head angle, longer chainstays.
Compare
2021 Merida CROSSWAY L 20-D
Longer chainstays, more stretched-out position.
Compare

Quick answers

Which size or configuration labels have geometry for the 2021 Specialized Sirrus 6.0?: Geometry is listed for XS, S, M, L, XL, and XXL.
What are the reach and stack of the 2021 Specialized Sirrus 6.0 in size L?: In size L, reach is 386 mm and stack is 649 mm.
What is the head tube angle of the 2021 Specialized Sirrus 6.0?: The head tube angle is 71.5 degrees in size L.
What does the 2021 Specialized Sirrus 6.0 ship with?: The stock build includes Shimano 105 R7000, Specialized Roubaix Pro 2BR, Shimano MT201, and Specialized Future.
Which years of the Specialized Sirrus are on Quiver?: Quiver has the Specialized Sirrus for 2021, 2023, 2022, 2020, 2019, 2018, 2017, 2015, 2014, 2013, 2012, 2011, 2010, 2009, and 2008.