The Giant Defy Advanced 2 (2026) is a road bike — representative silhouette: Road endurance. We have read 1 specification sheet (Giant Bicycles) and recorded 5 fit facts from it. 5 of the 14 measurements a road bike needs to answer fit questions are on file; 0 are confirmed by two independent sources. Where a measurement is missing, we say so below — we do not guess.
| Rear axle spacing | Thru-axle, 142 × 12 mm |
|---|---|
| Maximum tyre width (frame) | 40 mm |
| Wheel size (ISO bead seat) | 700c / 29" (ISO 622) |
| Front axle spacing | Thru-axle, 100 × 12 mm |
| Brake actuation | Hydraulic disc |
Confidence: every fact above comes from a single cited source — "derived" on our lattice; none is verified by a second independent publisher yet. A verdict that rests on a safety-critical fact therefore stops at "unknown" rather than "fits".
Not on file (required for a road bike): Bottom bracket shell · Derailleur hanger · Seatpost diameter · Brake mount, front · Brake mount, rear · Freehub body · Rear speeds · Chain standard · Pedal thread. The sheet we read does not state them; until a source does, confirm these measurements before choosing a part that depends on them.
- Why do so many verdicts on this bike read "unknown"?
- Because a verdict needs the bike's measurement for every dimension a part requires, and 9 of the 14 required measurements are not on file. "Unknown" means we could not check — not that it fits, and not that it does not.
- Will the verdicts change?
- Yes. When a second independent source confirms a measurement — or a first one states a missing one — the verdicts are recomputed from the new facts. Nothing on this page is typed by hand.