The 2025-on Giant Defy Advanced E+ Elite AR is an electric endurance-road bike built to preserve the look, fit, and road manners of the standard Defy while adding relatively discreet assistance. Rather than using a mid-drive system, Giant centered this platform around its SyncDrive Move Plus rear-hub motor and a slim, fully integrated 400Wh EnergyPak battery. That choice shapes the bike’s identity: it is intended to deliver support that feels smooth and understated, with low coasting drag and less of the bulky visual footprint that often separates e-road bikes from conventional drop-bar machines.
Within Giant’s range, this model sits at the lighter, more road-focused end of electric drop-bar bikes, but the AR version broadens its remit beyond pure pavement. Clearance for up to 38mm tires, combined with Giant’s D-Fuse compliance features at the seatpost and handlebar, positions it for long mixed-surface rides, rough pavement, and light gravel rather than aggressive off-road use. The top-tube RideControl Go interface, Smart Assist functionality, and optional 200Wh range extender reinforce that practical endurance brief. The result is a modern e-road platform aimed at riders who want help on longer, hillier rides without giving up the fit, handling, and overall presentation of a contemporary endurance bike.
Where to get it.
1 retailer · size S.
Spec sheet.
Every component shipped with this build.
Geometry & fit.
4 sizes published.
The geometry follows current endurance-road conventions, with a relatively tall front end and moderate reach numbers that should suit long-distance comfort more than aggressive race positioning. In size M, the bike pairs a 560mm stack with a 379mm reach; size ML moves to 576mm stack and 384mm reach; and size L reaches 595mm stack with 393mm reach. Those figures indicate an upright, less stretched riding position than a race bike, which fits the Defy name and the bike’s intended role as a high-mileage assisted road machine.
Handling numbers are also conservative and stable. Head tube angles of 71.5 degrees in S and 72.5 degrees in M through L are paired with 420mm chainstays across the range and wheelbases from 994mm to 1023mm. That combination points to predictable steering and solid straight-line composure, especially with larger-volume tires. The 75-80mm bottom-bracket drop keeps the rider planted in the bike rather than perched above it, which should add confidence on rough roads and light gravel. Overall, the geometry suggests a bike designed to feel calm, balanced, and comfortable under assist rather than especially sharp or race-oriented.
Where the handlebar sits relative to the bottom bracket — the single most important fit pair.
01Fit geometry6 values
02Component geometry3 values
03Handling geometry6 values
Which size should I buy?
Slide your height to see the recommended size. GearWise's fit algorithm works from the published stack, reach, and ETT — the brand's own recommendation may differ.
→Calculated from GearWise's own stack / reach / ETT algorithm — the brand's size chart may recommend a different size, and a proper bike fit beats any calculator.
The lineup.
1 build, ranging $7,350.
