Which size or configuration labels have geometry for the 2020 Specialized Tarmac Pro Disc?

Geometry is listed for 44, 49, 52, 54, 56, 58, and 61.

What are the reach and stack of the 2020 Specialized Tarmac Pro Disc in size 54?

In size 54, reach is 384 mm and stack is 544 mm.

What is the head tube angle of the 2020 Specialized Tarmac Pro Disc?

The head tube angle is 73 degrees in size 54.

What does the 2020 Specialized Tarmac Pro Disc ship with?

The stock build includes Specialized Tarmac SL6, SRAM Force eTAP AXS, Roval CL 50, and SRAM Force eTAP.

Which years of the Specialized Tarmac are on Quiver?

Quiver has the Specialized Tarmac for 2020, 2026, 2019, 2018, 2017, 2016, 2015, 2012, 2011, 2010, 2009, 2008, and 2007.

2020

2020 Specialized Tarmac Pro Disc

Road

The 2020 Specialized Tarmac Pro Disc sits more aggressive than most road bikes, with a longer rear center. Reach 365 to 408 mm, stack 500 to 612 mm. The Tarmac Pro Disc build comes with SRAM Force eTAP AXS shifting and Roval CL 50 wheels.

Compare with 1,900+ road bikes

Source: specialized.com. Checked Sep 5, 2026.

Key facts

Brand: Specialized
Model: Tarmac
Model year: 2020
Frame: Pro Disc
Type: Road
Geometry labels: 44, 49, 52, 54, 56, 58, and 61
Drivetrain: SRAM Force eTAP AXS
Wheels: Roval CL 50
Geometry: Complete for every size
Source: specialized.com
Checked: Sep 5, 2026

Geometry by size

Geometry drawing, size 54, to scale.

2020 Specialized Tarmac Pro Disc geometry by size
Measurement	44	49	52	54	56	58	61
Reach(mm)	365	375	380	384	395	402	408
Stack(mm)	500	514	527	544	565	591	612
Head tube angle(°)	70.5	71.75	72.5	73	73.5	73.5	74
Seat tube angle(°)	76	75.5	74	74	73.5	73.5	73
Chainstay length(mm)	410	410	410	410	410	410	410
Wheelbase(mm)	969	973	975	978	990	1005	1012
BB drop(mm)	74	74	74	72	72	72	72
BB height(mm)	266	266	266	268	268	268	268
Standover(mm)	730	740	755	775	795	826	850
Seat tube length(mm)	400	431	462	481	501	522	553
Fork length(mm)	363	363	363	363	363	363	363
Head tube length(mm)	105	115	126	143	163	190	210

How to read a geometry chart

Stock build

10 parts

Frame

Specialized Tarmac SL6

Frame

Drivetrain

SRAM Force eTAP AXS

Derailleur

SRAM XG-1270

CassetteFreehub body T-Type

SRAM Force

Chain

SRAM Force AXS

Crankset

SRAM DUB

Bottom bracket

Wheels & Tires

Roval CL 50

Wheelset

Specialized S-Works Turbo

TireCompound GRIPTONTPI 120 TPINot tubeless readyWeight ~220 g

Brakes

SRAM Force eTAP

Brake

Seatpost & Saddle

Specialized Power

Saddle

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Quick answers

Which size or configuration labels have geometry for the 2020 Specialized Tarmac Pro Disc?: Geometry is listed for 44, 49, 52, 54, 56, 58, and 61.
What are the reach and stack of the 2020 Specialized Tarmac Pro Disc in size 54?: In size 54, reach is 384 mm and stack is 544 mm.
What is the head tube angle of the 2020 Specialized Tarmac Pro Disc?: The head tube angle is 73 degrees in size 54.
What does the 2020 Specialized Tarmac Pro Disc ship with?: The stock build includes Specialized Tarmac SL6, SRAM Force eTAP AXS, Roval CL 50, and SRAM Force eTAP.
Which years of the Specialized Tarmac are on Quiver?: Quiver has the Specialized Tarmac for 2020, 2026, 2019, 2018, 2017, 2016, 2015, 2012, 2011, 2010, 2009, 2008, and 2007.