Bird Forge 2021
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Geometry
| Medium | Medium Long | Large | Extra Large (unsagged) | Extra Large | |
|---|---|---|---|---|---|
| Add to Compare | |||||
| Reach | 402 | 539 | 493 | 472 | 476 |
| Stack | 700 | 562 | 568 | 679 | 632 |
| Top Tube (effective) | 649 | 563 | 684 | 726 | 578 |
| Seat Tube C-T | 431 | 387 | 387 | 551 | |
| Seat Tube (effective) | 70 | 65 | 87 | 61 | |
| Head Angle | 78 | 52 | 65 | 72 | 55 |
| Seat Angle | 83 | 62 | 60 | 86 | 86 |
| Head Tube | 98 | 99 | 119 | 152 | 106 |
| Chainstay | 392 | 514 | 445 | 469 | 483 |
| Wheelbase | 1119 | 1449 | 1362 | 1512 | 1183 |
| BB Drop | 86 | 91 | 70 | 72 | 101 |
| BB Height | 292 | 347 | 292 | 321 | 289 |
| BB Type | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded |
| Fork Rake / Offset | 49 | 41 | 50 | 37 | 47 |
| Fork Length (A2C) | 566 | 433 | 589 | 559 | |
| Seatpost Diameter | 37 | 36 | 37 | 33 | 29 |
| Wheel Size | 28 | 23 | 32 | 30 | 34 |
| Front Travel | 163 | 118 | 124 | 150 | 125 |
| Headset | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 |
| Seat Clamp | 39 | 30 | 38 | 34 | 37 |
| Data Source | Manufacturer + https://madscientistmtb.com/sagged-hardtail-geometry-calculator/ | Manufacturer + https://madscientistmtb.com/sagged-hardtail-geometry-calculator/ | Manufacturer + https://madscientistmtb.com/sagged-hardtail-geometry-calculator/ | Manufacturer + https://madscientistmtb.com/sagged-hardtail-geometry-calculator/ | Manufacturer + https://madscientistmtb.com/sagged-hardtail-geometry-calculator/ |
Note: Sagged 30% with 140mm Fork
Standard measurements are in millimeters and degrees. The site attempts to recognize and convert other units back to standard - results may vary.
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