The Giant Defy Advanced 3 in Kelp Forest / Silver is the endurance road machine for riders who measure their rides in hours, not kilometers. For this season, this bike focuses on minimizing fatigue without sacrificing the snappy acceleration Giant is known for. It is the perfect entry point into high-performance carbon road riding, offering a "less is more" philosophy that prioritizes functional simplicity and ride quality.
The Kelp Forest / Silver finish is an organic, earthy green that blends seamlessly into rural landscapes, contrasted by sharp silver branding that adds a touch of modern visibility. While it sits at the entry of the Advanced range, it punches above its weight by mixing a Shimano Tiagra 10-speed drivetrain with a surprise Shimano 105 front derailleur—a strategic upgrade that ensures crisp, pro-level shifting at the front where it matters most for big ring transitions.
Frameset & Geometry
Frame: Advanced-Grade Composite, 12x142mm thru-axle, Disc, flat mount.
Fork: Advanced-Grade Composite, full-composite steerer, 12x100mm thru-axle.
Handlebar: Giant Contact SL D-Fuse, 31.8mm with 8-degree flare for better control.
Stem: Giant Contact AeroLight (integrated aero cable routing).
Seatpost: Giant D-Fuse Composite, 14mm offset (engineered flex for comfort).
Saddle: Giant Approach.
Color: Gloss Kelp Forest / Silver.
Drivetrain & Brakes
Shifters: Shimano Tiagra ST-4725, 2x10-speed hydraulic.
Front Derailleur: Shimano 105
Rear Derailleur: Shimano Tiagra.
Crankset: Shimano Tiagra, 34/50T
Cassette: Shimano Tiagra, 11-34T, 10-speed.
Chain: KMC X10-1.
Brakes: Shimano Tiagra Hydraulic Disc.
Rotors: Giant MPH, 160mm (Front & Rear).
Wheels & Tires
Wheelset: Giant S-R2 Disc, Alloy.
Hubs: Giant Alloy, 12mm Thru-Axle.
Spokes: Sapim Stainless Steel.
Tires: Giant Gavia Fondo 1, 700x32c, Tubeless (Factory set-up).
Max Tire Clearance: 38mm.
Key Performance Features
D-Fuse Technology: Both the seatpost and handlebar feature D-shaped tubing that allows for a specific amount of "flex" to absorb road shocks and vibrations, keeping you fresh for the final hour of your century ride.
Endurance Geometry: A taller headtube and shorter reach put you in a slightly more upright position than a pure race bike, reducing strain on your lower back and neck during long days in the saddle.
Tubeless Ready: Comes out of the box with a tubeless setup, which means fewer pinch flats and a smoother ride quality thanks to the ability to run lower tire pressures.
Strategic Gearing: The mix of the Tiagra 11-34T cassette and the upgraded Shimano 105 front derailleur provides a reliable climbing gear for steep hills while ensuring reliable, fast shifting when you attack the descent.