Which size or configuration labels have geometry for the 2015 Norco Threshold A1 Forma?

Geometry is listed for 45.5, 48, 50.0, 53, and 55.5.

What are the reach and stack of the 2015 Norco Threshold A1 Forma in size 50.0?

In size 50.0, reach is 372 mm and stack is 534 mm.

What is the head tube angle of the 2015 Norco Threshold A1 Forma?

The head tube angle is 70.5 degrees in size 50.0.

What does the 2015 Norco Threshold A1 Forma ship with?

The stock build includes Shimano 105 ST-5800 11spd - Black, WTB SX17 Disc 28H - Black w/Cyan, Shimano 105 ST-5800, and Norco Compact - Black w/Cyan.

Which years of the Norco Threshold are on Quiver?

Quiver has the Norco Threshold for 2015, 2021, 2020, 2019, 2018, and 2017.

2015

2015 Norco Threshold A1 Forma

Reach 362 to 389 mm, stack 514 to 569 mm. The Threshold A1 Forma build comes with Shimano 105 RD-5800-SS 11spd - Black shifting.

Compare geometry

Source: norco.com. Checked Oct 24, 2026.

Key facts

Brand: Norco
Model: Threshold
Model year: 2015
Frame: A1 Forma
Geometry labels: 45.5, 48, 50.0, 53, and 55.5
Drivetrain: Shimano 105 RD-5800-SS 11spd - Black
Geometry: Complete for every size
Source: norco.com
Checked: Oct 24, 2026

Geometry by size

2015 Norco Threshold A1 Forma geometry by size
Measurement	45.5	48	50.0	53	55.5
Reach(mm)	362	367	372	379	389
Stack(mm)	514	523	534	552	569
Head tube angle(°)	70	70	70.5	71.5	72.25
Seat tube angle(°)	75.5	75	74.5	74	73.75
Wheelbase(mm)	992	1000	1004	1008	1016
BB height(mm)	284.5	282.5	282.5	282.5	282.5
Seat tube length(mm)	455	480	505	530	555
Head tube length(mm)	95	105	115	130	145

How to read a geometry chart

Stock build

12 parts

Drivetrain

Shimano 105 ST-5800 11spd - Black

Shifter

Shimano 105 RD-5800-SS 11spd - Black

Derailleur

Shimano 105 CS-5800 11-32T 11 speed

Cassette

Shimano 105 CN-5800 11speed

Chain

Shimano FC-RS500 11spd - 46/36T

Crankset

Wheels & Tires

WTB SX17 Disc 28H - Black w/Cyan

Rim

Brakes

Shimano 105 ST-5800

Brake

Cockpit

Norco Compact - Black w/Cyan

Handlebar

Norco Black w/Cyan

Stem

Norco Anti-Slip Shockproof Gel - Black

Grips

Cane Creek 10-Series w/9mm Top Cover

Headset

Seatpost & Saddle

Norco Cross Forma Race - Black w/Cyan

Saddle

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Quick answers

Which size or configuration labels have geometry for the 2015 Norco Threshold A1 Forma?: Geometry is listed for 45.5, 48, 50.0, 53, and 55.5.
What are the reach and stack of the 2015 Norco Threshold A1 Forma in size 50.0?: In size 50.0, reach is 372 mm and stack is 534 mm.
What is the head tube angle of the 2015 Norco Threshold A1 Forma?: The head tube angle is 70.5 degrees in size 50.0.
What does the 2015 Norco Threshold A1 Forma ship with?: The stock build includes Shimano 105 ST-5800 11spd - Black, WTB SX17 Disc 28H - Black w/Cyan, Shimano 105 ST-5800, and Norco Compact - Black w/Cyan.
Which years of the Norco Threshold are on Quiver?: Quiver has the Norco Threshold for 2015, 2021, 2020, 2019, 2018, and 2017.