Bird Forge 2021
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Geometry
| Medium | Medium Long | Large | Extra Large (unsagged) | Extra Large | |
|---|---|---|---|---|---|
| Add to Compare | |||||
| Reach | 514 | 489 | 560 | 504 | 515 |
| Stack | 591 | 542 | 652 | 656 | 692 |
| Top Tube (effective) | 549 | 615 | 730 | 710 | 564 |
| Seat Tube C-T | 331 | 439 | 406 | 515 | |
| Seat Tube (effective) | 87 | 73 | 71 | 85 | |
| Head Angle | 76 | 61 | 60 | 55 | 66 |
| Seat Angle | 88 | 89 | 61 | 71 | 82 |
| Head Tube | 88 | 109 | 134 | 113 | 109 |
| Chainstay | 508 | 349 | 446 | 476 | 357 |
| Wheelbase | 1382 | 1280 | 1124 | 1159 | 1329 |
| BB Drop | 76 | 91 | 99 | 62 | 81 |
| BB Height | 279 | 316 | 344 | 316 | 301 |
| BB Type | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded |
| Fork Rake / Offset | 34 | 44 | 46 | 49 | 36 |
| Fork Length (A2C) | 484 | 426 | 553 | 482 | |
| Seatpost Diameter | 29 | 26 | 35 | 28 | 33 |
| Wheel Size | 31 | 25 | 28 | 25 | 26 |
| Front Travel | 137 | 113 | 167 | 121 | 153 |
| Headset | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 |
| Seat Clamp | 41 | 33 | 31 | 30 | 39 |
| 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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