Which size or configuration labels have geometry for the 2008 Specialized Tarmac Comp Double?

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

What are the reach and stack of the 2008 Specialized Tarmac Comp Double in size 56?

In size 56, reach is 565 mm and stack is 530 mm.

What does the 2008 Specialized Tarmac Comp Double ship with?

The stock build includes Shimano 105, Shimano RS-10, Shimano 105, and Specialized Pro-Set.

Which years of the Specialized Tarmac are on Quiver?

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

2008

2008 Specialized Tarmac Comp Double

Road

The 2008 Specialized Tarmac Comp Double sits at the aggressive end of the range for a road bike. Reach 518 to 600 mm, stack 460 to 580 mm. The Tarmac Comp Double build comes with Shimano 105 shifting and Shimano RS-10 wheels.

Compare with 1,800+ road bikes

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

Key facts

Brand: Specialized
Model: Tarmac
Model year: 2008
Frame: Comp Double
Type: Road
Geometry labels: 49, 52, 54, 56, 58, and 61
Drivetrain: Shimano 105
Wheels: Shimano RS-10
Geometry: Some measurements unavailable
Source: specialized.com
Checked: Sep 5, 2026

Geometry by size

2008 Specialized Tarmac Comp Double geometry by size
Measurement	49	52	54	56	58	61
Reach(mm)	518	537	548	565	582	600
Stack(mm)	460	490	510	530	550	580
Seat tube angle(°)	57	62	57	56	Not available	56
Seat tube length(mm)	405	405	405	405	407	410
Head tube length(mm)	170	170	172.5	172.5	175	175

Not available

Requested. Requests decide what we research next.

How to read a geometry chart

Stock build

12 parts

Drivetrain

Shimano 105

Shifter

Shimano 105

DerailleurWeight 138 g

Shimano Ultegra

Derailleur

Shimano 105

Chain

Shimano 105

CranksetChainring interface compactSpindle / BB interface Hollowtech II

Shimano 105

Bottom bracket

Wheels & Tires

Shimano RS-10

Wheelset

Specialized Mondo Pro

Tire

Brakes

Shimano 105

Brake

Cockpit

Specialized Pro-Set

Stem

Specialized Mindset Plus

Headset

Seatpost & Saddle

Specialized Toupé Team

Saddle

Keep your Tarmac Comp Double 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

Manufacturer

Keep the factory build and your current parts distinct

Quick answers

Which size or configuration labels have geometry for the 2008 Specialized Tarmac Comp Double?: Geometry is listed for 49, 52, 54, 56, 58, and 61.
What are the reach and stack of the 2008 Specialized Tarmac Comp Double in size 56?: In size 56, reach is 565 mm and stack is 530 mm.
What does the 2008 Specialized Tarmac Comp Double ship with?: The stock build includes Shimano 105, Shimano RS-10, Shimano 105, and Specialized Pro-Set.
Which years of the Specialized Tarmac are on Quiver?: Quiver has the Specialized Tarmac for 2008, 2026, 2020, 2019, 2018, 2017, 2016, 2015, 2012, 2011, 2010, 2009, and 2007.