Sizing and Geometry
Giant Defy
Sizing chart to be used as a reference only. The best way to determine your size is to visit us in-store and get fitted.
| Frame size | Rider Height | Rider Height (cm) |
| XS | 5'2"-5'6" | 157-169 |
| S | 5'5"-5'9" | 165-175 |
| M | 5'7"-5'11" | 171-181 |
| ML | 5'10"-6'2" | 177-187 |
| L | 6'0"-6'4" | 183-193 |
| XL | 6'2"-6'6" | 189-199 |
Geometry
| XS | S | M | ML | L | XL | ||
|---|---|---|---|---|---|---|---|
| A | Seat Tube Length (inch) | 16.1 | 17.5 | 18.9 | 20.3 | 21.1 | 22.2 |
| B | Seat Tube Angle | 74.5° | 74.0° | 73.5° | 73.0° | 73.0° | 73.0° |
| C | Top Tube Length (inch) | 20.3 | 20.9 | 21.5 | 22 | 22.6 | 23.4 |
| D | Head Tube Length (inch) | 4.7 | 5.5 | 5.9 | 6.9 | 7.7 | 8.5 |
| E | Head Tube Angle | 70.5° | 71.8° | 72.5° | 72.5° | 72.5° | 72.5° |
| F | Fork Rake (inch) | 2 | 2 | 2 | 2 | 2 | 2 |
| G | Trail (inch) | 2.8 | 2.5 | 2.3 | 2.3 | 2.3 | 2.3 |
| H | Wheelbase (inch) | 39.2 | 39.1 | 39.3 | 39.8 | 40.4 | 40.9 |
| I | Chain Stay Length (inch) | 16.5 | 16.5 | 16.5 | 16.5 | 16.5 | 16.5 |
| J | Bottom Bracket Drop (inch) | 3 | 3 | 3 | 2.8 | 2.8 | 2.8 |
| K | Stack (inch) | 20.7 | 21.3 | 22 | 22.7 | 23.5 | 24.2 |
| L | Reach (inch) | 14.5 | 14.8 | 15 | 15.1 | 15.5 | 15.8 |
| M | Stand Over Height (inch) | 27.8 | 28.9 | 30 | 31.3 | 32 | 33.1 |
| O | Stem Length (inch) | 3.1 | 3.5 | 3.9 | 3.9 | 4.3 | 4.3 |
| P | Crank Length (inch) | 6.7 | 6.7 | 6.8 | 6.8 | 6.9 | 6.9 |
| Q | Wheel Size | 700C | 700C | 700C | 700C | 700C | 700C |