Bird Forge 2021
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Geometry
| Medium | Medium Long | Large | Extra Large (unsagged) | Extra Large | |
|---|---|---|---|---|---|
| Add to Compare | |||||
| Reach | 488 | 437 | 403 | 580 | 616 |
| Stack | 710 | 745 | 716 | 656 | 711 |
| Top Tube (effective) | 676 | 517 | 583 | 629 | 795 |
| Seat Tube C-T | 391 | 374 | 456 | 438 | |
| Seat Tube (effective) | 65 | 88 | 63 | 64 | |
| Head Angle | 56 | 57 | 62 | 76 | 68 |
| Seat Angle | 80 | 82 | 61 | 73 | 83 |
| Head Tube | 115 | 91 | 116 | 140 | 143 |
| Chainstay | 361 | 406 | 414 | 450 | 438 |
| Wheelbase | 1290 | 1113 | 1230 | 1119 | 1244 |
| BB Drop | 74 | 91 | 92 | 60 | 77 |
| BB Height | 330 | 303 | 253 | 332 | 341 |
| BB Type | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded |
| Fork Rake / Offset | 44 | 44 | 47 | 35 | 48 |
| Fork Length (A2C) | 531 | 569 | 435 | 472 | |
| Seatpost Diameter | 27 | 35 | 29 | 33 | 30 |
| Wheel Size | 26 | 32 | 34 | 24 | 33 |
| Front Travel | 145 | 138 | 138 | 137 | 157 |
| Headset | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 |
| Seat Clamp | 31 | 37 | 38 | 34 | 33 |
| 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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