Defy Advanced 0

The fifth-generation Giant Defy Advanced is a dedicated endurance road bike that relies on refined carbon engineering rather than mechanical suspension to manage fatigue. Redesigned for the 2024 model year, the platform introduces a lighter frame and a sportier silhouette while retaining its signature D-Fuse flex components. Giant positions the Defy for riders who want the efficiency and aesthetic of a pure race bike but need the compliance to handle long days on imperfect pavement.

By expanding tire clearance to 38mm and introducing a premium Advanced SL tier, Giant has broadened the bike's capability without pushing it into the gravel category. It remains a road-focused machine, prioritizing high-speed stability and vibration damping over off-road versatility.

$4,500

Build

Size

Stack	558mm
Reach	380mm
Top tube	545mm
Headtube length	150mm
Standover height	762mm
Seat tube length	480mm

Fit and geometry

The latest Defy Advanced geometry marks a calculated shift toward a more performance-oriented fit. Giant lowered the stack height by roughly 10mm across most sizes and slightly extended the reach compared to the previous generation. This adjustment allows riders to achieve a more aerodynamic posture, reducing the upright sensation common to traditional endurance frames, while still remaining sustainable for multi-hour efforts.

Handling is shaped by a relatively long wheelbase and a short trail figure. The short trail keeps the initial steering input quick and responsive, while the longer wheelbase resists rapid mid-corner corrections, creating a highly stable platform on fast descents.

The cockpit relies heavily on Giant's proprietary D-Fuse system. The D-shaped seatpost is engineered to flex fore and aft under load, isolating the rider from saddle impacts without introducing unwanted lateral movement. Up front, the matching D-Fuse handlebars feature flattened tops that provide noticeable give when riding on the hoods. However, the use of an oversized, D-shaped steerer tube strictly limits aftermarket stem choices, tying riders to Giant's component ecosystem for fit adjustments.

Full specs

Frameset

Frame

Advanced-grade Composite, 12x142mm thru-axle, disc

Fork

Advanced-grade Composite fork, full-composite OverDrive steerer, 12x100mm thru-axle, disc

Groupset

Shift levers

Shimano 105 Di2

Front derailleur

Shimano 105 Di2

Rear derailleur

Shimano 105 Di2

Cassette

Shimano 105, 12-speed, 11-36T

Chain

KMC X12L-1

Crankset

Shimano 105, 34/50 (XS:165mm, S:165mm, M:170mm, M/L:170mm, L:172.5mm, XL:172.5mm)

Bottom bracket

Shimano press fit

Front brake

Shimano 105 hydraulic disc

Rear brake

Shimano 105 hydraulic disc

Front rotor

Shimano RT-CL700, 160mm

Rear rotor

Shimano RT-CL700, 160mm

Wheelset

Front wheel

Giant SLR 2 40 Carbon Disc WheelSystem (CenterLock, 12x100mm thru-axle)

Rear wheel

Giant SLR 2 40 Carbon Disc WheelSystem (CenterLock, 12x142mm thru-axle, 3-pawl driver)

Front tire

Giant Gavia Fondo 0, tubeless, 700x32c (33.5mm), folding

Rear tire

Giant Gavia Fondo 0, tubeless, 700x32c (33.5mm), folding

Cockpit

Stem

Giant Contact AeroLight (XS:80mm, S:90mm, M:100mm, M/L:100mm, L:110mm, XL:110mm)

Handlebars

Giant Contact SL D-Fuse (XS:404/380mm, S:404/380mm, M:424/400mm, M/L:424/400mm, L:444/420mm, XL:444/420mm)

Saddle

Giant Approach

Seatpost

Giant D-Fuse, composite, 14mm offset

Grips

Stratus Lite 3.0

Builds

The Defy Advanced lineup is structured around Giant’s Advanced-grade composite frames, with the available builds differentiated primarily by their drivetrains and wheelsets. Both the 0 and 2 builds share the exact same frame, fork, and proprietary D-Fuse carbon seatpost, ensuring the core ride quality remains consistent across the price points.

The Advanced 0 build represents the premium option in this tier, featuring a Shimano 105 Di2 electronic groupset for precise, low-effort shifting. It also includes a significant rolling upgrade with Giant’s SLR 2 40 carbon wheelset, which drops weight and adds aerodynamic efficiency compared to standard alloy hoops.

The Advanced 2 build serves as the entry point, utilizing Shimano’s mechanical 12-speed 105 groupset. While it forgoes electronic shifting, it retains the same wide-range 11-36T cassette and 50/34T chainrings, providing identical gearing for steep climbs. The primary compromise on the 2 build is the Giant P-R1 alloy wheelset, which adds rotational weight. Both builds ship with 32mm Giant Gavia Fondo tubeless tires and feature hidden fender mounts, adding practical year-round versatility to the package.

$3,300

$4,500

Selected

Reviews

Reviewers consistently praise the Defy Advanced for achieving high-level compliance without the weight or complexity of proprietary suspension systems. The frame and D-Fuse components work together to mute road chatter, resulting in a ride that "wafts" (Road.cc) over ruined asphalt. Rather than feeling muted or disconnected, testers found the bike maintains a "cohesive liveliness" (Cyclist Magazine) that responds eagerly to pedal inputs. However, it remains a dedicated pavement machine; one reviewer described the ride quality as "composed-but-not-cushy" (Escape Collective), noting that the front end can feel stiff if pushed onto rougher gravel paths.

Handling is widely regarded as highly stable at speed, benefiting from a relatively long wheelbase and generous fork rake. This geometry excels on fast descents and sweeping corners, but it introduces a minor tradeoff in low-speed agility. In tight, technical hairpins, the steering can feel "demanding" (Granfondo) or slightly sluggish compared to a pure race bike.

A recurring critique across multiple reviews centers on the stock tires found on mid-range and entry-level builds. While they offer excellent grip, testers noted they can feel sluggish, suggesting an eventual tire upgrade is the easiest way to maximize the frame's performance.