Sizing and Geometry
Giant Fastroad SL
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 | 5'1"-5'3" | 155-165 |
| S | 5'3"-5'7" | 160-170 |
| M | 5'7"-5'11" | 170-180 |
| ML | 5'9"-6'1" | 175-185 |
| L | 5'11"-6'3" | 180-190 |
| XL | 6'3"-6'7" | 190-200 |
Geometry
| XS | S | M | ML | L | XL | ||
|---|---|---|---|---|---|---|---|
| A | Seat Tube Length (mm) | 430 | 445 | 460 | 490 | 520 | 550 |
| B | Seat Tube Angle | 73.5° | 73.5° | 73.0° | 73.0° | 72.5° | 72.5° |
| C | Top Tube Length (mm) | 540 | 545 | 560 | 575 | 595 | 615 |
| D | Head Tube Length (mm) | 105 | 130 | 155 | 180 | 200 | 225 |
| E | Head Tube Angle | 71.0° | 71.5° | 72.0° | 72.0° | 72.5° | 72.5° |
| F | Fork Rake (mm) | 50 | 50 | 50 | 50 | 50 | 50 |
| G | Trail (mm) | 68 | 64.7 | 61.5 | 61.5 | 58.2 | 58.2 |
| H | Wheelbase (mm) | 1013 | 1014 | 1020 | 1035 | 1045 | 1065 |
| I | Chain Stay Length (mm) | 425 | 425 | 425 | 425 | 425 | 425 |
| J | Bottom Bracket Drop (mm) | 70 | 70 | 70 | 70 | 70 | 70 |
| K | Stack (mm) | 511 | 537 | 563 | 586 | 607 | 631 |
| L | Reach (mm) | 388 | 386 | 388 | 395 | 403 | 416 |
| M | Stand Over Height (mm) | 681 | 697 | 719 | 741 | 767 | 795 |
| N | Handlebar Width (mm) | 580 | 580 | 620 | 620 | 620 | 620 |
| O | Stem Length (mm) | 80 | 90 | 100 | 100 | 110 | 110 |
| P | Crank Length (mm) | 170 | 170 | 170 | 175 | 175 | 175 |
| Q | Wheel Size | 700c | 700c | 700c | 700c | 700c | 700c |