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

Geometry is listed for 49, 52, 54, 56, 58, 61, and 64.

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

In size 56, reach is 395 mm and stack is 564 mm.

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

The head tube angle is 73.5 degrees in size 56.

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

The stock build includes Specialized Tarmac SL5, Shimano Ultegra R8000, Roval SLX 24, and Shimano Ultegra R8000.

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 Comp geometry and specs

Key facts

Brand: Specialized
Model: Tarmac
Model year: 2018
Frame: Men's Comp
Type: Road
Geometry labels: 49, 52, 54, 56, 58, 61, and 64
Drivetrain: Shimano Ultegra R8000
Wheels: Roval SLX 24
Geometry: Complete for every size
Source: specialized.com
Checked: Oct 22, 2026

Geometry by size

Geometry drawing, size 56, to scale.

2018 Specialized Tarmac Men's Comp geometry by size
Measurement	49	52	54	56	58	61	64
Reach(mm)	386	386	387	395	402	408	415
Stack(mm)	504	526	543	564	591	612	636
Head tube angle(°)	72.25	73	73	73.5	73.5	74	74
Seat tube angle(°)	75.5	74	73.5	73.25	73	72.5	72.5
Effective top tube(mm)	518	537	548	565	582	600	621
Chainstay length(mm)	405	405	405	405	407	410	410
Wheelbase(mm)	970	970	978	986	1003	1013	1016
BB drop(mm)	71.5	71.5	69	69	67.5	67.5	67.5
BB height(mm)	270	270	272.5	272.5	274	274	274.5
Standover(mm)	730	755	775	795	826	850	850
Seat tube length(mm)	431	462	481	501	522	553	584
Fork length(mm)	368	368	368	368	368	368	368
Head tube length(mm)	100	120	140	160	190	210	235

How to read a geometry chart

Stock build

11 parts

Frame

Specialized Tarmac SL5

Frame

Drivetrain

Shimano Ultegra R8000

ShifterSpeeds 11

Shimano Ultegra R8000

Derailleur

Shimano 105

CassetteSpeeds 11Range 11-28

KMC X11 EL

ChainSpeeds 11

Shimano Ultegra R8000

Crankset

Shimano Ultegra

Bottom bracket

Wheels & Tires

Roval SLX 24

Wheelset

Specialized S-Works Turbo

TireTPI 120 TPI

Brakes

Shimano Ultegra R8000

Brake

Seatpost & Saddle

Specialized Toupe Comp

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 Comp?: Geometry is listed for 49, 52, 54, 56, 58, 61, and 64.
What are the reach and stack of the 2018 Specialized Tarmac Men's Comp in size 56?: In size 56, reach is 395 mm and stack is 564 mm.
What is the head tube angle of the 2018 Specialized Tarmac Men's Comp?: The head tube angle is 73.5 degrees in size 56.
What does the 2018 Specialized Tarmac Men's Comp ship with?: The stock build includes Specialized Tarmac SL5, Shimano Ultegra R8000, Roval SLX 24, and Shimano Ultegra R8000.
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.