Sizing and Geometry
Giant Fathom
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.
| Sizing | Rider Height | Rider Height (cm) |
|---|---|---|
| Small | 5′ 4″ – 5′ 8″ | 163 – 172 |
| Medium | 5′ 7″ – 5′ 11″ | 171 – 180 |
| Large | 5′ 10″ – 6′ 2″ | 179 – 188 |
| Extra Large | 6′ 2″ – 6′ 6″ | 187 – 198 |
Geometry
| S | M | L | XL | ||
|---|---|---|---|---|---|
| A | Seat Tube Length (mm) | 380 | 430 | 465 | 495 |
| A1 | Seat Post Insertion Depth (mm) | 300 | 200 | 235 | 285 |
| B | Seat Tube Angle | 75.0° | 75.0° | 75.0° | 75.0° |
| C | Top Tube Length (mm) | 592 | 612 | 639 | 662 |
| D | Head Tube Length (mm) | 95 | 95 | 105 | 115 |
| E | Head Tube Angle | 66.0° | 66.0° | 66.0° | 66.0° |
| F | Fork Rake (mm) | 44 | 44 | 44 | 44 |
| G | Trail (mm) | 122 | 122 | 122 | 122 |
| H | Wheelbase (mm) | 1157 | 1177 | 1206 | 1230 |
| I | Chain Stay Length (mm) | 438 | 438 | 438 | 438 |
| J | Bottom Bracket Drop (mm) | 60 | 60 | 60 | 60 |
| K | Stack (mm) | 622 | 622 | 631 | 640 |
| L | Reach (mm) | 425 | 445 | 470 | 490 |
| M | Stand Over Height (mm) | 727 | 746 | 764 | 791 |
| O | Stem Length (mm) | 40 | 40 | 50 | 50 |
| P | Crank Length (mm) | 165 | 170 | 170 | 170 |
| Q | Wheel Size | 29" | 29" | 29" | 29" |