Sizing and Geometry
Giant Roam
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) |
| S | 5'3"-5'7" | 160-170 |
| M | 5'7"-5'11" | 170-180 |
| L | 5'11"-6'3" | 180-190 |
| XL | 6'3"-6'6" | 190-200 |
Geometry
| S | M | L | XL | ||
|---|---|---|---|---|---|
| A | Seat Tube Length (inch) | 16.5 | 18.1 | 19.7 | 21.7 |
| B | Seat Tube Angle | 73.0° | 73.0° | 73.0° | 73.0° |
| C | Top Tube Length (inch) | 23.2 | 23.6 | 24 | 24.6 |
| D | Head Tube Length (inch) | 4.5 | 5.1 | 5.7 | 6.3 |
| E | Head Tube Angle | 70.5° | 70.5° | 70.5° | 70.5° |
| F | Fork Rake (inch) | 1.7 | 1.7 | 1.7 | 1.7 |
| G | Trail (inch) | 3.3 | 3.3 | 3.3 | 3.3 |
| H | Wheelbase (inch) | 42.8 | 43.2 | 43.7 | 44.3 |
| I | Chain Stay Length (inch) | 17.7 | 17.7 | 17.7 | 17.7 |
| J | Bottom Bracket Drop (inch) | 2.4 | 2.4 | 2.4 | 2.4 |
| K | Stack (inch) | 23.9 | 24.4 | 25 | 25.5 |
| L | Reach (inch) | 15.9 | 16.1 | 16.4 | 16.8 |
| M | Stand Over Height (inch) | 28.5 | 29.8 | 31 | 32.6 |
| O | Stem Length (inch) | 2.8 | 3.1 | 3.5 | 3.9 |
| P | Crank Length (inch) | 6.7 | 6.7 | 6.9 | 6.9 |
| Q | Wheel Size | 700C | 700C | 700C | 700C |