Which size or configuration labels have geometry for the 2020 Jamis FAULTLINE A1?

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

What are the reach and stack of the 2020 Jamis FAULTLINE A1 in size S/15.5"?

In size S/15.5", reach is 415 mm and stack is 611 mm.

What is the head tube angle of the 2020 Jamis FAULTLINE A1?

The head tube angle is 67.5 degrees in every size.

What does the 2020 Jamis FAULTLINE A1 ship with?

The stock build includes RockShox 35 RL 29” Gold, SRAM SX Eagle, WTB ST i25 TCS 29” tubeless rims, and Shimano MT401 hydraulic disc.

Which years of the Jamis FAULTLINE A1 are on Quiver?

Quiver has the Jamis FAULTLINE A1 for 2020 and 2021.

2020

2020 Jamis FAULTLINE A1

Reach 415 to 483 mm, stack 611 to 639 mm. The FAULTLINE A1 build comes with WTB ST i25 TCS 29” tubeless rims wheels.

Compare geometry

Source: bikecatalogs.com. Checked Oct 4, 2026.

Key facts

Brand: Jamis
Model: FAULTLINE A1
Model year: 2020
Geometry labels: L/19", M/17", S/15.5", and XL/21"
Fork: RockShox 35 RL 29” Gold
Wheels: WTB ST i25 TCS 29” tubeless rims
Geometry: Complete for every size
Checked: Oct 4, 2026

Geometry by size

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

2020 Jamis FAULTLINE A1 geometry by size
Measurement	L/19"	M/17"	S/15.5"	XL/21"
Reach(mm)	460	438	415	483
Stack(mm)	630	621	611	639
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)	445	445	445	445
Wheelbase(mm)	1205	1179	1153	1232
BB drop(mm)	35	35	35	35
Standover(mm)	725	739	713	725
Head tube length(mm)	125	115	105	135

How to read a geometry chart

Stock build

14 parts

Suspension

RockShox 35 RL 29” Gold

Fork

Drivetrain

SRAM SX Eagle

ShifterSpeeds 12

SRAM SX Eagle

Cassette

SRAM SX Eagle

ChainSpeeds 12

SRAM X1 Eagle

Crankset

SRAM DUB

Bottom bracket

Wheels & Tires

WTB ST i25 TCS 29” tubeless rims

Wheelset

Brakes

Shimano MT401 hydraulic disc

Brake

Cockpit

Race Face Ride

HandlebarWidth 760mm

Race Face Ride

StemBar clamp diameter 31.8mmSteerer diameter 1 1/8"Rise 6°Material Aluminum

Jamis Lock-On

Grips

FSA Orbit 1.5 Zero-Stack internal cup

Headset

Seatpost & Saddle

KS Rage 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 FAULTLINE A1?: Geometry is listed for L/19", M/17", S/15.5", and XL/21".
What are the reach and stack of the 2020 Jamis FAULTLINE A1 in size S/15.5"?: In size S/15.5", reach is 415 mm and stack is 611 mm.
What is the head tube angle of the 2020 Jamis FAULTLINE A1?: The head tube angle is 67.5 degrees in every size.
What does the 2020 Jamis FAULTLINE A1 ship with?: The stock build includes RockShox 35 RL 29” Gold, SRAM SX Eagle, WTB ST i25 TCS 29” tubeless rims, and Shimano MT401 hydraulic disc.
Which years of the Jamis FAULTLINE A1 are on Quiver?: Quiver has the Jamis FAULTLINE A1 for 2020 and 2021.