Argon 18 Nitrogen Pro
The Argon 18 Nitrogen Pro isn't just a comeback; it’s a revolution. By optimizing the frame and wheels as a single aerodynamic system, we’ve created a machine that delivers world-class speed without the weight penalty. Featuring a Pro-level carbon layup and the proprietary ATTEN integrated cockpit, the Nitrogen Pro is built for the podium, offering a sub-7kg profile that defies the traditional limits of an aero road bike.
Speed. Light. Fit. Now You Can Have It All.
Starting from: £9,500

Argon 18 Nitrogen Pro: A Samurai Sword for the Road
The Nitrogen Pro represents the pinnacle of Argon 18 engineering. Inspired by the track-proven Electron Pro TKO, it utilises horizontal dropped seat stays and a flow-optimised headtube to reduce drag in real-world conditions. This isn’t a bike designed solely for a wind tunnel; it is designed for the sharp reflexes and precision handling required in the heat of a breakaway. With its ultra-stiff oversized bottom bracket and integrated aero bottle system, the Nitrogen Pro ensures that every watt is converted into pure, relentless velocity.
Key Features
Pro Level Layup
Argon 18 leave no room for compromise when we build bikes for the most demanding and passionate cyclists.
Road Race Geometry
Argon 18's road race geometry is designed around the razor-sharp reflexes and precision handling required for racers of all levels.
Argon Fit System
Argon 18's fit system offers size-specific geometries to provide optimal performance and positioning for all sizes, guaranteeing no rider left behind.
Available Colours
Aurora Charcoal

| Geometry | XXS 44-46 | XS 47-50 | S 51-53 | M 54-56 | L 57-59 | XL 60-62 |
|---|---|---|---|---|---|---|
|
A
Seat tube Height (cm)
|
39.5 | 42.5 | 46.0 | 50.5 | 55.0 | 59.5 |
|
B
Seat tube angle (deg)
|
75.0 | 74.5 | 74.0 | 73.5 | 73.0 | 72.5 |
|
C
Head Tube Angle (deg)
|
71.2 | 72.1 | 72.7 | 72.7 | 72.7 | 73.0 |
|
D
Top tube length (cm)
|
50.2 | 51.9 | 53.7 | 55.7 | 57.8 | 60.1 |
|
E
Chain stay length (cm)
|
41.0 | 41.0 | 41.0 | 41.0 | 41.0 | 41.0 |
|
F
Wheelbase (cm)
|
96.7 | 97.2 | 97.5 | 99.0 | 100.6 | 102.0 |
|
G
BB Drop (cm)
|
7.1 | 7.5 | 7.9 | 7.9 | 7.9 | 7.9 |
|
H1
Head Tube Length S (cm)
|
8.1 | 9.7 | 11.3 | 13.8 | 16.5 | 19.2 |
|
I
Stand Over Height (cm)
|
68.2 | 70.6 | 73.4 | 77.2 | 81.0 | 84.8 |
|
L
Fork Length (Axle-to-crown) (cm)
|
37.6 | 37.6 | 37.6 | 37.6 | 37.6 | 37.6 |
|
R
Fork Rake (cm)
|
4.9 | 4.9 | 4.5 | 4.5 | 4.5 | 4.5 |
|
J
Stack (cm)
|
48.6 | 50.8 | 53.1 | 55.5 | 58.0 | 60.7 |
|
K
Reach (cm)
|
37.0 | 37.7 | 38.4 | 39.2 | 40.0 | 40.9 |
|
Saddle Height Min (cm)
|
56.5 | 59.5 | 63.0 | 67.5 | 72.0 | 76.5 |
|
Saddle Height Max (cm)
|
71.5 | 74.5 | 78.0 | 82.5 | 87.0 | 91.5 |
Example Builds
Build Options
Shimano Ultegra Di2
£9,500
- Frame Nitrogen Pro
- Wheels ATTEN X Scope Artech 6.A+
- Tyres Vittoria Corsa Pro TLR 30c
- Tyre Clearance 32c (34mm)
- Groupset Shimano Ultegra Di2 R8150

Shimano Dura-Ace Di2
£12,500
- Frame Nitrogen Pro
- Wheels ATTEN X Scope Artech 6.A+
- Tyres Vittoria Corsa Pro TLR 30c
- Tyre Clearance 32c (34mm)
- Groupset Shimano Dura-Ace Di2 R9250

SRAM RED AXS
£13,000
- Frame Nitrogen Pro
- Wheels ATTEN X Scope Artech 6.A+
- Tyres Vittoria Corsa Pro TLR 30c
- Tyre Clearance 32c (34mm)
- Groupset SRAM Red AXS

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