Giant 2025 Defy Advanced 1
With effortless efficiency and quiet compliance, this lightweight endurance road machine helps you ride stronger and longer. The composite frame and purpose-built components smooth out rough roads and minimize fatigue.
Functional simplicity
Free of cumbersome gimmickry, the frameset is one of the lightest in its category. With a perfect balance of high-performance reactivity and all-day comfort, it offers a “less is more” experience for modern endurance road riding.
Engineered compliance
Advanced-grade composite frame and fork are specifically engineered for endurance road riding, delivering a smooth and efficient ride quality that minimizes fatigue on long rides. The new D-Fuse components work together to further absorb road shocks and vibrations.
Total control
New Contact D-Fuse handlebar features ergonomic shaping and an 8-degree flare for comfort and control on all-day rides. Wide, alloy rims are optimized for high-volume tubeless tires (up to 38mm), providing predictable handling and stability from asphalt to cobbles.
| Specification | Details |
| Model | Giant 2025 Defy Advanced 1 Road Bike |
| Sizes | XS, S, M, M/L, L, XL |
| Seat Tube Lengths | XS/41cm, S/44.5cm, M/48cm, ML/51.5cm |
| Colors | Frost Silver/Cordovan, Solar Flare |
| Frame | Advanced-Grade Composite, 12x142mm thru-axle, disc |
| Fork | Advanced-Grade Composite, full-composite OverDrive steerer, 12x100mm thru-axle, disc |
| Shock | N/A |
| Handlebar | Giant Contact SL D-Fuse XS:40/42cm, S:40/42cm, M:42/44cm, M/L:42/44cm, L:44/46cm, XL:44/46cm |
| Grips | Stratus Lite 3.0 |
| Stem | Giant Contact AeroLight XS:80mm, S:90mm, M:100mm, M/L:100mm, L:110mm, XL:110mm |
| Seatpost | Giant D-Fuse, composite, 14mm offset |
| Saddle | Giant Approach |
| Pedals | platform pedal [GCS,GTS] N/A [all other GSC] |
| Shifters | Shimano 105 Di2 |
| Front Derailleur | Shimano 105 Di2 |
| Rear Derailleur | Shimano 105 Di2 |
| Brakes | Shimano 105 Di2 hydraulic, Giant MPH rotors [F]160mm, [R]160mm |
| Brake Levers | Shimano 105 Di2 |
| Cassette | Shimano 105, 12-speed, 11x36 |
| Chain | KMC X12L-1 |
| Crankset | Shimano 105, 34/50 XS:170mm, S:170mm, M:172.5mm, M/L:172.5mm, L:175mm, XL:175mm |
| Bottom Bracket | Shimano, press fit |
| Rims | Giant P-R2 Disc wheelset, alloy, [F]25mm, [R]25mm |
| Hubs | Giant alloy, 12mm thru-axle |
| Spokes | Sapim |
| Tires | Giant Gavia Fondo 1, tubeless, 700x32c (33.5mm), folding |
| Extras | fender mount, water bottle cages, tubeless prepared, 40mm max tire size |