"Engineered for Performance: Fast Just got Faster"
Stand out with the stunning design of the new Sum Pro with refined aesthetic and premium builds, making every ride extraordinary.
Fast Just got Faster
Engineered for Performance
Stand out with the stunning design of the Sum Pro with refined aesthetic and premium builds, making every ride extraordinary.
Hourglass Shaped Headtube
Draft Deflecting Fork Blades
Downtube Profile
D-Shaped Seatpost & Integrated Seatpost Clamp
The Sum Pro in action
Technology Sum Pro
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.
Sum Pro Life
My Road to the Summit with Emil Holm
As we approach one of the biggest international sporting events on the calendar, we’re talking to Argon 18 athletes who have qualified for Paris to hear about their training, goals, and inspiration along the way. Read on to hear from Danish triathlete Emil Holm.
Pro Rider Insights: The Team Novo Nordisk Sum Pro
The Team Novo Nordisk 2025 edition of the Sum Pro represents more than cutting-edge engineering—it’s a symbol of hope and empowerment.
Behind the Design: The Sum Pro’s Real-World Advantage
The Sum Pro combines aero engineering and lightweight performance to be the ultimate road race machine: fast on the flats, powerful on the climbs. But how do we know we’re delivering real-world results to our riders?
What the
media say
"Lightweight, incredibly supple, and engaging on twisty roads, the Argon 18 has impressed me from start to finish."
"Undeniably fast, Impressively rapid acceleration, great handling."
"The Sum Pro is an uncompromisingly sporty race machine - and more than “just” an aero model. It is agile, stiff, smooth-running and sensibly equipped."
"The Sum Pro boasts the type of refined ride characteristics that any performance-oriented rider would need."
"I’ve been very impressed with the Sum Pro’s turn of speed and predictable but sharp handling."
"An uncompromising race bike with a sporty position, agile handling, and high-quality features."
Configurations
SRAM RED AXS
Shimano Dura-Ace Di2
SRAM Force AXS
Shimano Ultegra Di2