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Stand out with the stunning design of the Sum Pro with refined aesthetic and premium builds, making every ride extraordinary.
- DT Swiss ARC1400 Dicut Wheelset
- Tires : Challenge Criterium RS TLR 28c Black
- Tire Clearance : 30C (32mm)
- Bottom Bracket : CeramicSpeed BB86 Shimano Coated
- Front Derailleur : Shimano Ultegra Di2 R8150
- Rear Derailleur : Shimano Ultegra Di2 R8150
- Crankset : Shimano Ultegra R8100 52/36
- Chain : Shimano Ultegra CN-M8100 12S
- Cassette : Shimano Ultegra CS-R8100 11-30
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
Our 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 optimize 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.
Pro Level Layup
We leave no room for compromise when we build bikes for the most demanding and passionate cyclists.
Our Performance Protocol
The Argon 18 Performance Protocol is a structured, methodical approach we take to developing high-performance bikes. Combining advanced aerodynamics, rigorous testing, and an unwavering focus on quality, the protocol ensures that every bike we create is optimized for speed, precision, and comfort—allowing you to ride your best.
Lighter and Faster than World Tour Winning Bikes
Wind tunnel testing confirms that the Sum Pro matches the aerodynamic performance of the fastest and most winning bikes in the World Tour peloton, while being significantly lighter. On Alpe d’Huez, this translates to an 11-second advantage for a pro rider—proof that the Sum Pro delivers the marginal gains that can mean the difference between winning and losing.
Data-Driven Development
Computational Fluid Dynamics (CFD) guided the design, allowing us to perfect the frame’s aerodynamics before prototyping. Hundreds of iterations optimized the downtube, toptube, and seatstays for the ideal balance between stiffness, weight, and drag reduction. The hourglass-shaped head tube ensures low drag, while ultra-narrow seatstays balance compliance with speed.
Optimized for Race Conditions
Every Sum Pro frame undergoes extreme stress testing, simulating real-world conditions from cobbled classics to high-speed descents. The result? A bike that delivers uncompromising performance, race after race.
Featherweight Performance With No Compromises
The Sum Pro frame is engineered for pro-level weight savings without sacrificing stiffness or ride quality. Our Shimano Dura-Ace Di2 built with Scope Artech A4 wheels, weighs just 6.41 kilos.
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Review Argon 18 2025 Sum Pro Shimano Ultegra Di2
