Bird Forge 2021
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Geometry
| Medium | Medium Long | Large | Extra Large (unsagged) | Extra Large | |
|---|---|---|---|---|---|
| Add to Compare | |||||
| Reach | 388 | 394 | 426 | 594 | 612 |
| Stack | 779 | 597 | 542 | 757 | 694 |
| Top Tube (effective) | 584 | 728 | 630 | 768 | 605 |
| Seat Tube C-T | 455 | 360 | 471 | 413 | |
| Seat Tube (effective) | 83 | 82 | 86 | 67 | |
| Head Angle | 77 | 57 | 68 | 58 | 70 |
| Seat Angle | 79 | 81 | 70 | 67 | 65 |
| Head Tube | 88 | 122 | 109 | 123 | 140 |
| Chainstay | 396 | 442 | 414 | 427 | 426 |
| Wheelbase | 976 | 1083 | 1467 | 1029 | 1504 |
| BB Drop | 76 | 91 | 91 | 70 | 74 |
| BB Height | 275 | 271 | 287 | 273 | 261 |
| BB Type | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded |
| Fork Rake / Offset | 48 | 41 | 42 | 47 | 38 |
| Fork Length (A2C) | 462 | 477 | 495 | 542 | |
| Seatpost Diameter | 28 | 28 | 35 | 37 | 28 |
| Wheel Size | 24 | 34 | 27 | 25 | 32 |
| Front Travel | 143 | 126 | 131 | 113 | 117 |
| Headset | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 |
| Seat Clamp | 30 | 35 | 32 | 40 | 29 |
| 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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