The Argon 18 Sum is built for speed in all aspects of your ride. It combines the all-around nature and technical lightweight handling of the Gallium with the aerodynamic efficiency of the Nitrogen. Regardless of your goals on the road, the Sum Pro is here to help. Climbs, crits, and classics alike are all ready to be conquered with this diverse bike. Race-ready handling along with premium ride quality make it both fast and comfortable over long distances. The Argon 18 Sum offers an excellent value for superior climbing, sprinting, and endurance.

Aerodynamics are a key to the success of the Sum. Thanks to CFD analysis, Argon 18 managed to create a frame that is comparable in weight to the Gallium Pro and similar to the aero efficiency of the Nitrogren. Dropped seatstays and an indented seat tube help keep you in the perfect aero riding position while remaining comfortable. An updated size range also focuses on rider position across all sizes. This updated system also greatly improves handling, especially at high speeds. The 3D integrated front end makes this handling better than ever. Argon 18s Road Race Geometry ensures the fastest and most technically accurate performance on every ride.

The frame of the Sum features their Elite Level Layup. This results in a lower price while maintaining a very high level of performance in the form of aero efficiency and low weight. Vision Team 30 Clincher Wheels are added for all-around riding and a lower price. The frame contains the Topological Compliance System which adds endurance-like compliance to the bike, making it perfect for long distance riders. Equipped with a SRAM Rival eTap AXS groupset for 12-speed electronic shifting, this is the most affordable version of the Sum. The Argon 18 Sum is a worthy accomplice for any road ride.