Bird Forge 2021
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Geometry
| Medium | Medium Long | Large | Extra Large (unsagged) | Extra Large | |
|---|---|---|---|---|---|
| Add to Compare | |||||
| Reach | 393 | 515 | 549 | 435 | 429 |
| Stack | 539 | 765 | 736 | 661 | 621 |
| Top Tube (effective) | 576 | 662 | 542 | 732 | 752 |
| Seat Tube C-T | 382 | 410 | 482 | 545 | |
| Seat Tube (effective) | 74 | 70 | 68 | 71 | |
| Head Angle | 56 | 62 | 73 | 67 | 76 |
| Seat Angle | 80 | 61 | 70 | 67 | 67 |
| Head Tube | 99 | 128 | 132 | 128 | 129 |
| Chainstay | 403 | 502 | 445 | 442 | 492 |
| Wheelbase | 1208 | 1035 | 1114 | 1344 | 1225 |
| BB Drop | 74 | 96 | 93 | 59 | 102 |
| BB Height | 250 | 325 | 299 | 277 | 262 |
| BB Type | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded |
| Fork Rake / Offset | 43 | 46 | 35 | 38 | 33 |
| Fork Length (A2C) | 468 | 452 | 585 | 496 | |
| Seatpost Diameter | 30 | 32 | 27 | 32 | 25 |
| Wheel Size | 31 | 23 | 28 | 33 | 34 |
| Front Travel | 117 | 154 | 158 | 149 | 123 |
| Headset | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 |
| Seat Clamp | 34 | 30 | 37 | 35 | 28 |
| 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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