2025 Argon 18 Sum Shimano Ultegra Di2 Carbon Aero Race Road Bike

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USD 3,750.00 USD 6,250.00

Brand: Argon 18

Product Code: ARG202513VTR

Availability: In Stock

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Product Description

2025 Argon 18 Sum Shimano Ultegra Di2 | Carbon Aero Race Road Bike

2025 Argon 18 Sum Shimano Ultegra Di2

The Perfect Balance. Pro-Level Aerodynamics Meets Precision Electronic Shifting.

The 2025 Argon 18 Sum is the ultimate all-rounder, meticulously engineered to combine the aerodynamic efficiency of the Nitrogen with the pure climbing agility of the Gallium Pro. Designed for the competitive cyclist, the Sum utilizes a CFD-optimized carbon layup that ensures stability in crosswinds and explosive power transfer. Outfitted with the industry-standard Shimano Ultegra Di2 electronic groupset and high-performance Scope R4 carbon wheels, this machine is ready to dominate every road race and weekend epic.

Key Highlights

Aero-Light Carbon Frame: CFD-optimized profiles designed to slice through the wind while maintaining an ultra-lightweight structure.
Shimano Ultegra Di2 R8150: Lightning-fast 12-speed electronic shifting providing professional-tier reliability and precision.
Scope R4 Carbon Wheelset: Aerodynamic 45mm depth wheels that offer the perfect balance of lightweight climbing and flat-road speed.
Total Integration: Fully internal cable routing through the FSA SMR-II system for a clean look and reduced aerodynamic drag.
30C Tire Clearance: Rated for tires up to 30c (32mm measured), providing superior grip and comfort on varied road surfaces.

Technical Specifications

Frameset & Cockpit
Frame	SUM Carbon Aero Race, Fully Integrated Cables
Fork	SUM Specific Carbon, Flat Mount Disc
Headset	FSA NO.55R 1.5'' + 3D System
Handlebar	FSA Energy SCR Compact
Stem	FSA SMR-II Integrated Cable Routing
Seatpost	Argon 18 SUM Specific Carbon
Saddle	Repente Quasar
Drivetrain & Shifting
Groupset	Shimano Ultegra Di2 R8150, 2x12 Speed Electronic
Crankset	Shimano Ultegra R8100, 52/36T
Cassette	Shimano Ultegra CS-R8100, 11-30T
Bottom Bracket	Shimano Ultegra SM-BB72 Press Fit
Chain	Shimano Ultegra CN-M8100
Brakes & Wheelset
Brakes	Shimano Ultegra Di2 R8170 Hydraulic Disc
Rotors	Shimano Ultegra RT-CL800 (F: 160mm / R: 140mm)
Wheels	Scope R4 Carbon, Tubeless Ready
Tires	Vittoria Corsa N.EXT TLR 28mm
Clearance	30c (Max 32mm Measured)

Ride Character

The 2025 Argon 18 Sum represents the modern evolution of a road bike. It provides a surgically precise handling profile that inspires confidence on technical descents, while the laterally stiff frame ensures zero watt loss during explosive sprints. Combined with the lightning-fast, semi-wireless shifting of the Shimano Ultegra Di2, the Sum offers a premium racing experience that is accessible, reliable, and undeniably fast on every road.