Which size or configuration labels have geometry for the 2020 Jamis PORTAL C1?

Geometry is listed for L/19", M/17", S/15.5", and XL/21".

What are the reach and stack of the 2020 Jamis PORTAL C1 in size S/15.5"?

In size S/15.5", reach is 418 mm and stack is 606 mm.

What is the head tube angle of the 2020 Jamis PORTAL C1?

The head tube angle is 67.5 degrees in every size.

What does the 2020 Jamis PORTAL C1 ship with?

The stock build includes Fox 36 Float 29 Factory, SRAM XX1 Eagle, Stan's NoTubes Arch CB7 Carbon 29", and TRP G-Spec Trail SL 4-piston hydraulic disc.

Which years of the Jamis PORTAL C1 are on Quiver?

Quiver has the Jamis PORTAL C1 for 2020.

2020

2020 Jamis PORTAL C1

Reach 418 to 482 mm, stack 606 to 634 mm. The PORTAL C1 build comes with SRAM XX1 Eagle shifting and Stan's NoTubes Arch CB7 Carbon 29" wheels.

Compare geometry

Source: bikecatalogs.com. Checked Oct 10, 2026.

Key facts

Brand: Jamis
Model: PORTAL C1
Model year: 2020
Geometry labels: L/19", M/17", S/15.5", and XL/21"
Drivetrain: SRAM XX1 Eagle
Fork: Fox 36 Float 29 Factory
Rear shock: Fox DHX2 Series coil Factory
Wheels: Stan's NoTubes Arch CB7 Carbon 29"
Geometry: Complete for every size
Checked: Oct 10, 2026

Geometry by size

Geometry drawing, size M/17", to scale.

2020 Jamis PORTAL C1 geometry by size
Measurement	L/19"	M/17"	S/15.5"	XL/21"
Reach(mm)	461	439	418	482
Stack(mm)	625	615	606	634
Head tube angle(°)	67.5	67.5	67.5	67.5
Seat tube angle(°)	74.5	74.5	74.5	74.5
Effective top tube(mm)	635	610	585	660
Chainstay length(mm)	437	437	437	437
Wheelbase(mm)	1198	1173	1148	1224
BB drop(mm)	33	33	33	33
Standover(mm)	754	749	754	774
Head tube length(mm)	125	115	105	135

How to read a geometry chart

Stock build

17 parts

Suspension

Fox 36 Float 29 Factory

Fork

Fox DHX2 Series coil Factory

Rear shock

Drivetrain

SRAM XX1 Eagle

ShifterSpeeds 12

SRAM XX1 Eagle

DerailleurSpeeds 12

SRAM XX1 Eagle

CassetteSpeeds 12

SRAM XX1 Eagle

ChainSpeeds 12

TruVativ Descendant Carbon

Crankset

SRAM DUB

Bottom bracket

Wheels & Tires

Stan's NoTubes Arch CB7 Carbon 29"

Wheelset

Vittoria Martello 29 x 2.35”

Tire

Brakes

TRP G-Spec Trail SL 4-piston hydraulic disc

Brake

Cockpit

Race Face Turbine R

HandlebarWidth 780mm

Race Face Turbine-R

Stem

Jamis Lock-On

Grips

FSA Orbit IS Integrated

Headset

Seatpost & Saddle

Fox Transfer Dropper

Seatpost

WTB Volt

SaddleWidth 135 / 142 / 150mmLength 265mm

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Quick answers

Which size or configuration labels have geometry for the 2020 Jamis PORTAL C1?: Geometry is listed for L/19", M/17", S/15.5", and XL/21".
What are the reach and stack of the 2020 Jamis PORTAL C1 in size S/15.5"?: In size S/15.5", reach is 418 mm and stack is 606 mm.
What is the head tube angle of the 2020 Jamis PORTAL C1?: The head tube angle is 67.5 degrees in every size.
What does the 2020 Jamis PORTAL C1 ship with?: The stock build includes Fox 36 Float 29 Factory, SRAM XX1 Eagle, Stan's NoTubes Arch CB7 Carbon 29", and TRP G-Spec Trail SL 4-piston hydraulic disc.
Which years of the Jamis PORTAL C1 are on Quiver?: Quiver has the Jamis PORTAL C1 for 2020.

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