Argon 18 Sum
Why choose between aero and lightweight when you can have both? The Argon 18 Sum is engineered for the rider who demands a single machine for every day of the week. By combining the aerodynamic profiles of the Nitrogen with the climbing agility of a dedicated lightweight racer, the Sum delivers a versatile, high-performance ride that excels on the flats, the hills, and everything in between.
The Sum of Every Advantage.
Starting from: £1,750
Argon 18 Sum: Pro-Level Performance for the Real World
The Argon 18 Sum shares the same race-proven geometry and aerodynamic tube shaping as its “Pro” sibling but is constructed with our Elite-level carbon layup. This results in a frame that is remarkably responsive and lightweight while offering a more compliant ride quality for long training days and amateur racing. Featuring a redesigned fork and the 3D System for customisable head tube height, the Sum ensures a perfect fit without sacrificing front-end stiffness. With clearance for 30mm tires and a focus on “Real World” aerodynamics—meaning the bike is fast at the wind angles you actually encounter—the Sum is the definitive answer for those who want a bike that does it all.
Key Features
3D System
Get the best fit window without compromising the safety, steerer stiffness, or looks of your bike with Argon 18's 3D Technology.
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.
Topological Compliance System
Proprietary design method to offer exceptional vertical compliance and dampened road-induced vibrations while retaining maximum stiffness. Each bike model featuring TCS technology was individually analysed to optimise frame topology and carbon layup.
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.
Elite Level Layup
We believe the discerning cyclist deserves more than just trickle-down technology. Argon 18's Elite level bikes benefit from the same attention to detail as our Pro level ones.
Available Colours
Smoked Nickel
British Racing Green
| 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)
|
50.3 | 52.0 | 53.8 | 55.7 | 57.8 | 60.0 |
|
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)
|
6.9 | 7.3 | 7.7 | 7.7 | 7.7 | 7.7 |
|
H1
Head Tube Length 3D (0mm) (cm)
|
6.9 | 8.5 | 10.1 | 12.6 | 15.2 | 18.0 |
|
H2
Head Tube Length 3D (15mm) (cm)
|
8.4 | 10.0 | 11.6 | 14.1 | 16.7 | 19.5 |
|
H3
Head Tube Length 3D (25mm) (cm)
|
9.4 | 11.0 | 12.6 | 15.1 | 17.7 | 20.5 |
|
I
Stand Over Height (cm)
|
67.6 | 70.0 | 72.7 | 76.6 | 80.4 | 84.1 |
|
J
Stack 3D (0mm) (cm)
|
47.1 | 49.3 | 51.6 | 54.0 | 56.5 | 59.2 |
|
J
Stack 3D (15mm) (cm)
|
48.5 | 50.7 | 53.0 | 55.4 | 57.9 | 60.6 |
|
J
Stack 3D (25mm) (cm)
|
49.5 | 51.7 | 54.0 | 56.4 | 58.9 | 61.6 |
|
K
Reach 3D (0mm) (cm)
|
37.5 | 38.2 | 38.9 | 39.7 | 40.5 | 41.4 |
|
K
Reach 3D (15mm) (cm)
|
37.0 | 37.7 | 38.5 | 39.3 | 40.1 | 41.0 |
|
K
Reach 3D (25mm) (cm)
|
36.7 | 37.4 | 38.2 | 39.0 | 39.8 | 40.7 |
|
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
Frameset
£1,750
Shimano 105 Di2
£3,325
- Frame SUM
- Wheels Scope S4.A
- Tyres Vittoria Corsa N.EXT TLR 28mm
- Tyre Clearance 30C (32mm)
- Groupset Shimano 105 Di2 R7150
Shimano Ultegra Di2
£4,025
- Frame SUM
- Wheels Scope R4
- Tyres Vittoria Corsa N.EXT TLR 28mm
- Tyre Clearance 30C (32mm)
- Groupset Shimano Ultegra Di2 R8150
SRAM Force AXS
£4,725
- Frame SUM
- Wheels Scope R4
- Tyres Vittoria Corsa N.EXT TLR 28mm
- Tyre Clearance 30C (32mm)
- Groupset SRAM Force AXS E1
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