Which size or configuration labels have geometry for the 2018 Specialized Tarmac Men's Pro?

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

What are the reach and stack of the 2018 Specialized Tarmac Men's Pro in size 56?

In size 56, reach is 395 mm and stack is 565 mm.

What is the head tube angle of the 2018 Specialized Tarmac Men's Pro?

The head tube angle is 73.5 degrees in size 56.

What does the 2018 Specialized Tarmac Men's Pro ship with?

The stock build includes Specialized Tarmac SL6, Shimano Ultegra R8150 Di2, Roval CL 50, and Shimano Ultegra R8010.

Which years of the Specialized Tarmac are on Quiver?

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

2018 Specialized Tarmac Men's Pro geometry and specs

Key facts

Brand: Specialized
Model: Tarmac
Model year: 2018
Frame: Men's Pro
Type: Road
Geometry labels: 49, 52, 54, 56, 58, and 61
Drivetrain: Shimano Ultegra R8050 Di2
Wheels: Roval CL 50
Geometry: Complete for every size
Source: specialized.com
Checked: Oct 22, 2026

Geometry by size

Geometry drawing, size 54, to scale.

2018 Specialized Tarmac Men's Pro geometry by size
Measurement	49	52	54	56	58	61
Reach(mm)	375	380	384	395	402	408
Stack(mm)	514	527	544	565	591	612
Head tube angle(°)	71.75	72.5	73	73.5	73.5	74
Seat tube angle(°)	75.5	74	74	73.5	73.5	73
Effective top tube(mm)	508	531	540	562	577	595
Chainstay length(mm)	405	405	405	405	407	410
Wheelbase(mm)	968	970	973	985	1002	1012
BB drop(mm)	74	74	72	72	72	72
BB height(mm)	266	266	268	268	268	268
Standover(mm)	740	755	775	795	826	850
Seat tube length(mm)	431	462	481	501	522	553
Fork length(mm)	363	363	363	363	363	363
Head tube length(mm)	115	126	143	163	190	210

How to read a geometry chart

Stock build

10 parts

Frame

Specialized Tarmac SL6

Frame

Drivetrain

Shimano Ultegra R8150 Di2

Shifter

Shimano Ultegra R8050 Di2

Derailleur

Shimano Ultegra R8000

CassetteRange 11-30

Shimano Ultegra

Chain

Praxis 6806

Bottom bracket

Wheels & Tires

Roval CL 50

Wheelset

Specialized S-Works Turbo

TireTPI 120 TPI

Brakes

Shimano Ultegra R8010

Brake

Seatpost & Saddle

Specialized Toupe Expert

Saddle

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Manufacturer

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Quick answers

Which size or configuration labels have geometry for the 2018 Specialized Tarmac Men's Pro?: Geometry is listed for 49, 52, 54, 56, 58, and 61.
What are the reach and stack of the 2018 Specialized Tarmac Men's Pro in size 56?: In size 56, reach is 395 mm and stack is 565 mm.
What is the head tube angle of the 2018 Specialized Tarmac Men's Pro?: The head tube angle is 73.5 degrees in size 56.
What does the 2018 Specialized Tarmac Men's Pro ship with?: The stock build includes Specialized Tarmac SL6, Shimano Ultegra R8150 Di2, Roval CL 50, and Shimano Ultegra R8010.
Which years of the Specialized Tarmac are on Quiver?: Quiver has the Specialized Tarmac for 2018, 2026, 2020, 2019, 2017, 2016, 2015, 2012, 2011, 2010, 2009, 2008, and 2007.