Which size or configuration labels have geometry for the 2018 Specialized Demo I Carbon?

Geometry is listed for M, SHORT, LONG, and EXTRA LONG.

What are the reach and stack of the 2018 Specialized Demo I Carbon in size LONG?

In size LONG, reach is 440 mm and stack is 614 mm.

What is the head tube angle of the 2018 Specialized Demo I Carbon?

The head tube angle is 63.5 degrees in every size.

What does the 2018 Specialized Demo 8 I Carbon ship with?

The stock build includes RockShox BoXXer Team 27.5, SRAM X-7, Specialized Butcher, and SRAM Code R.

Which years of the Specialized Demo are on Quiver?

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

2018 Specialized Demo I Carbon geometry and specs

Key facts

Brand: Specialized
Model: Demo
Model year: 2018
Frame: I Carbon
Type: Downhill
Geometry labels: M, SHORT, LONG, and EXTRA LONG
Drivetrain: SRAM GX
Fork: RockShox BoXXer Team 27.5
Rear shock: Öhlins TTX
Geometry: Complete for every size
Source: specialized.com
Checked: Oct 22, 2026

Geometry by size

Geometry drawing, size SHORT, to scale.

2018 Specialized Demo I Carbon geometry by size
Measurement	M	SHORT	LONG	EXTRA LONG
Reach(mm)	420	395	440	460
Stack(mm)	614	614	614	614
Head tube angle(°)	63.5	63.5	63.5	63.5
Seat tube angle(°)	74	74	74	74
Effective top tube(mm)	596	571	616	636
Chainstay length(mm)	430	430	430	430
Wheelbase(mm)	1208	1183	1228	1248
BB drop(mm)	12	12	12	12
BB height(mm)	342	342	342	342
Standover(mm)	698	698	698	698
Seat tube length(mm)	367	367	367	367
Head tube length(mm)	105	105	105	105

How to read a geometry chart

Stock build

13 parts

Suspension

RockShox BoXXer Team 27.5

ForkOffset 48mm

Öhlins TTX

Rear shock

Drivetrain

SRAM X-7

Shifter

SRAM GX

Derailleur

SRAM PG-1030

CassetteSpeeds 10Freehub body Shimano HG

SRAM PC-1031

Chain

SRAM Descendant

CranksetCrank length 165mmMaterial Aluminum

Specialized Bennies

Pedals

Wheels & Tires

Specialized Butcher

TireTPI 60 TPIBead FoldingTubeless ready 2Bliss ReadyWeight ~1060 g

Brakes

SRAM Code R

Brake

Cockpit

Specialized two-piece

StemLength 45mm

Specialized Sip Grip

Grips

Seatpost & Saddle

Specialized Phenom Comp

Saddle

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Bikes to compare with the Demo

Same kind of bike with the closest frame angles and proportions. Differences are how each one compares to this bike.

2018 Specialized Demo 8 Frameset
Close on every number both bikes have.
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2020 Trek Session AL 27.5 Frameset
Longer chainstays.
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2020 Trek Session C 27.5 Frameset
Longer chainstays, lower bottom bracket.
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Quick answers

Which size or configuration labels have geometry for the 2018 Specialized Demo I Carbon?: Geometry is listed for M, SHORT, LONG, and EXTRA LONG.
What are the reach and stack of the 2018 Specialized Demo I Carbon in size LONG?: In size LONG, reach is 440 mm and stack is 614 mm.
What is the head tube angle of the 2018 Specialized Demo I Carbon?: The head tube angle is 63.5 degrees in every size.
What does the 2018 Specialized Demo 8 I Carbon ship with?: The stock build includes RockShox BoXXer Team 27.5, SRAM X-7, Specialized Butcher, and SRAM Code R.
Which years of the Specialized Demo are on Quiver?: Quiver has the Specialized Demo for 2018, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2017, 2016, 2015, 2014, 2012, 2011, 2010, and 2009.