Which size or configuration labels have geometry for the 2018 Specialized Roubaix Comp Sagan Collection?

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

What are the reach and stack of the 2018 Specialized Roubaix Comp Sagan Collection in size 56?

In size 56, reach is 381 mm and stack is 611 mm.

What is the head tube angle of the 2018 Specialized Roubaix Comp Sagan Collection?

The head tube angle is 73.5 degrees in size 56.

Which years of the Specialized Roubaix are on Quiver?

Quiver has the Specialized Roubaix for 2018, 2027, 2026, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2017, 2016, 2015, 2014, 2012, 2011, 2010, 2009, 2008, and 2007.

2018

2018 Specialized Roubaix Comp Sagan Collection

Road

The 2018 Specialized Roubaix Comp Sagan Collection sits at the upright end of the range for a road bike, with a steeper head angle and a longer rear center. Reach 369 to 403 mm, stack 549 to 679 mm. The Roubaix Comp Sagan Collection build comes with Shimano Ultegra R8000 shifting and Roval SLX 24 wheels.

Compare with 1,800+ road bikes

Source: specialized.com. Checked Oct 22, 2026.

Key facts

Brand: Specialized
Model: Roubaix
Model year: 2018
Frame: Comp Sagan Collection
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 Roubaix Comp Sagan Collection geometry by size
Measurement	49	52	54	56	58	61	64
Reach(mm)	369	371	375	381	386	392	403
Stack(mm)	549	569	585	611	644	665	679
Head tube angle(°)	72	72.25	72.75	73.5	73.5	74	74
Seat tube angle(°)	74	74	74	73.5	73.5	73.5	73
Effective top tube(mm)	527	534.9	545	561.8	576.3	588.5	610
Chainstay length(mm)	413	413	415	415	418	418	418
Wheelbase(mm)	981	987	987	993	1011	1018	1033
BB drop(mm)	77.5	77.5	76	76	74.5	74.5	74.5
Standover(mm)	715.5	743	762	785	813	844.3	860.8
Seat tube length(mm)	425	462	481	501	522	563	584
Head tube length(mm)	90	110	125	150	185	205	220

How to read a geometry chart

Stock build

10 parts

Drivetrain

Shimano Ultegra

Shifter

Shimano Ultegra R8000

Derailleur

Shimano 105

CassetteSpeeds 11Range 11-32

KMC X11 EL

ChainSpeeds 11

Praxis Zayante

Crankset

Wheels & Tires

Roval SLX 24

Wheelset

Specialized Turbo Pro

TireTPI 60 TPI

Cockpit

Specialized Comp Hover

Handlebar

Seatpost & Saddle

Specialized S-Works CG-R

Seatpost

Specialized Phenom Comp

Saddle

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Quick answers

Which size or configuration labels have geometry for the 2018 Specialized Roubaix Comp Sagan Collection?: Geometry is listed for 49, 52, 54, 56, 58, 61, and 64.
What are the reach and stack of the 2018 Specialized Roubaix Comp Sagan Collection in size 56?: In size 56, reach is 381 mm and stack is 611 mm.
What is the head tube angle of the 2018 Specialized Roubaix Comp Sagan Collection?: The head tube angle is 73.5 degrees in size 56.
What does the 2018 Specialized Roubaix Comp Sagan Collection ship with?: The stock build includes Shimano Ultegra, Roval SLX 24, Specialized Comp Hover, and Specialized S-Works CG-R.
Which years of the Specialized Roubaix are on Quiver?: Quiver has the Specialized Roubaix for 2018, 2027, 2026, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2017, 2016, 2015, 2014, 2012, 2011, 2010, 2009, 2008, and 2007.