The Giant Defy Advanced 1 is engineered for the dedicated road enthusiast who prioritizes "functional simplicity"—a design philosophy that strips away heavy mechanical gimmicks in favour of pure carbon engineering. The 2026 model is built around a handcrafted Advanced-grade composite frameset that stands as one of the lightest in its category. By balancing high-performance reactivity with engineered vertical compliance, it delivers a "less is more" experience that excels during long-distance sportives and challenging mountain passes.
This build is defined by the inclusion of the Shimano 105 Di2 electronic drivetrain, bringing professional-level shifting speed and reliability to a more accessible price point. To further combat rider fatigue, the bike utilizes a full-system approach to vibration damping; the D-Fuse composite seatpost and handlebar work in tandem to neutralize road buzz before it reaches the rider. Finished in the striking Thundercloud colourway, the Defy Advanced 1 is a versatile endurance machine that remains stable and composed whether you are sprinting on smooth asphalt or navigating rougher backroads.
Frameset & Geometry
Frame: Advanced-Grade Composite, 12x142mm Thru-Axle, Disc
Fork: Advanced-Grade Composite, Full-Composite OverDrive Steerer, 12x100mm Thru-Axle
Handlebar: Giant Contact SL D-Fuse, Alloy, 31.8mm (with 8-degree flare)
Stem: Giant Contact AeroLight
Seatpost: Giant D-Fuse, Composite, 14mm Offset
Saddle: Giant Approach (with ParticleFlow technology)
Color: Thundercloud
Drivetrain & Brakes
Shifters: Shimano 105 Di2 ST-R7170, 2x12-Speed (Electronic)
Front Derailleur: Shimano 105 Di2 FD-R7150
Rear Derailleur: Shimano 105 Di2 RD-R7150
Crankset: Shimano 105, 34/50T
Cassette: Shimano 105, 12-Speed, 11-36T
Chain: KMC X12L-1
Brakes: Shimano 105 Hydraulic Disc
Brake Levers: Shimano 105 Di2 Hydraulic (Shimano SM-RT64 Rotors: 160mm Front / 160mm Rear)
Wheels & Tires
Wheelset: Giant P-R1 Disc Wheelset, Alloy (25mm inner rim width, Tubeless Ready)
Hubs: Giant Alloy, CenterLock, 12mm Thru-Axle
Spokes: Sapim Stainless Steel
Tires: Giant Gavia Fondo 0, Tubeless, 700x32c (Effective width ~33.5mm)
Max Tire Clearance: 40mm
Key Technologies
Shimano 105 Di2: Offers seamless electronic shifting that is both instinctive and highly customizable via the Shimano E-Tube app.
OverDrive Aero: The D-shaped fork steerer allows for integrated, hidden cable routing through the headset for a cleaner cockpit and improved aerodynamics.
D-Fuse Technology: The proprietary D-shaped components provide up to 12mm of controlled flex, significantly reducing the impact of road vibrations.
Factory Tubeless: Ships with tubeless valves and sealant, allowing for lower tire pressures that increase traction and virtually eliminate pinch flats.