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2025
Giant 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 minimise fatigue.
Highlights
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 minimises 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 optimised for high-volume tubeless tyres (up to 38mm), providing predictable handling and stability from asphalt to cobbles.
Geometry
| S | M | |
|---|---|---|
| Seat Tube Length | S445 | M480 |
| Seat Tube Angle | S74.0° | M73.5° |
| Top Tube Length | S530 | M545 |
| Head Tube Length | S140 | M145 |
| Head Tube Angle | S71.75° | |
| Fork Rake (mm) | S50 | |
| Trail | S63.4 | |
| Wheelbase | S994.4 | |
| Chain Stay Length | S420 | |
| Bottom Bracket Drop | S75 | |
| Stack | S541 | |
| Reach | S374.3 | |
| Stand Over Height | S716 | |
| Stem Length | S90 | |
| Crank Length | S170 | |
| Wheel Size | S700C |
Technical specifications
| Size | XS, S, M, M/L, L, XL |
| Colours | Frost Silver |
| Frame | Advanced-Grade Composite, disc |
| Fork | Advanced-Grade Composite, full-composite OverDrive steerer, 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 | N/A |
| Shifters | Shimano 105 Di2 ST-R7170 |
| Front Derailleur | Shimano 105 Di2 FD-7150 |
| Rear Derailleur | Shimano 105 Di2 RD-7150 |
| 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 |
| Hubs | Giant P-R2 Disc wheelset, alloy Giant alloy, 12mm thru-axle |
| Spokes | Sapim |
| Tires | Giant Gavia Fondo 1, tubeless, 700x32c (33.5mm), folding |
| Extras | Water bottle cages, tubeless prepared, 38mm max tyre size |
| Weight | The most accurate way to determine any bike’s weight is to have your local dealer weigh it for you. Many brands strive to list the lowest possible weight, but in reality weight can vary based on size, finish, hardware and accessories. All our bikes are designed for best-in-class weight and ride quality. |
