Fast just got faster. The Sum Pro is a refined, premium reworking of the Sum for riders who want a bike that stands out as much as it accelerates — lightweight, remarkably supple and engaging on twisty roads. Argon 18 wind-tunnel tested it to match the aero performance of the fastest World Tour bikes while weighing significantly less.
Key features
- Hourglass-shaped headtube and draft-deflecting fork blades
- CFD-optimised downtube, top tube and seatstay profiles
- D-shaped seatpost with integrated clamp
- 3D System — proprietary headtube extension for a wide fit window without compromising steerer stiffness
- Topological Compliance System (TCS) for vertical compliance and vibration damping
- Argon Fit System — size-specific geometry
- 6.41kg complete with Shimano Dura-Ace Di2 and Scope Artech A4 wheels
- Claimed 11-second advantage for a pro rider up Alpe d'Huez
Frame
| Layup |
Pro Level Layup carbon |
| Fork |
Carbon, draft-deflecting blades |
| Seatpost |
D-shaped with integrated clamp |
| Fit |
3D System, Argon Fit System |
| Geometry |
Road Race Geometry |
| Complete weight |
6.41 kg (Dura-Ace Di2, Scope Artech A4) |
Builds
- SRAM RED AXS — £8,400
- Shimano Dura-Ace Di2 — £7,700
- Shimano Ultegra Di2 — £5,775
All sizes: XXS (44-46), XS (47-50), S (51-53), M (54-56), L (57-59), XL (60-62).
Also available as a frameset at £2,800. Colours: Titanium / Racing Red and Crystal Black / Foil.
Sizes and fit
Available in frame sizes XXS (44-46), XS (47-50), S (51-53), M (54-56), L (57-59) and XL (60-62). Size-specific geometry comes from the Argon Fit System, and the 3D System headtube extension gives a wide fit window without compromising steerer stiffness.
Colours
Available in Titanium / Racing Red and Crystal Black / Foil.
Materials and construction
- Frame: Pro Level Layup carbon, with an hourglass-shaped headtube and CFD-optimised downtube, top tube and seatstay profiles
- Fork: carbon, with draft-deflecting blades
- Seatpost: D-shaped with integrated clamp
- Topological Compliance System (TCS) for vertical compliance and vibration damping
- Geometry: Road Race Geometry
- Groupset choices: SRAM RED AXS, Shimano Dura-Ace Di2 or Shimano Ultegra Di2
- Claimed complete weight 6.41 kg with Shimano Dura-Ace Di2 and Scope Artech A4 wheels
