Bird Forge 2021
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Geometry
| Medium | Medium Long | Large | Extra Large (unsagged) | Extra Large | |
|---|---|---|---|---|---|
| Add to Compare | |||||
| Reach | 454 | 415 | 515 | 543 | 467 |
| Stack | 704 | 531 | 571 | 726 | 603 |
| Top Tube (effective) | 578 | 729 | 756 | 666 | 693 |
| Seat Tube C-T | 355 | 406 | 418 | 507 | |
| Seat Tube (effective) | 66 | 71 | 62 | 69 | |
| Head Angle | 75 | 53 | 75 | 54 | 56 |
| Seat Angle | 67 | 72 | 83 | 66 | 76 |
| Head Tube | 113 | 96 | 99 | 136 | 114 |
| Chainstay | 379 | 382 | 497 | 380 | 476 |
| Wheelbase | 1293 | 1191 | 1207 | 1135 | 1438 |
| BB Drop | 94 | 95 | 71 | 65 | 74 |
| BB Height | 313 | 334 | 236 | 333 | 297 |
| BB Type | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded |
| Fork Rake / Offset | 49 | 49 | 46 | 40 | 36 |
| Fork Length (A2C) | 473 | 600 | 528 | 437 | |
| Seatpost Diameter | 29 | 25 | 29 | 25 | 27 |
| Wheel Size | 26 | 32 | 28 | 31 | 27 |
| Front Travel | 120 | 118 | 127 | 155 | 136 |
| Headset | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 |
| Seat Clamp | 39 | 38 | 39 | 38 | 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
Measurements are in millimeters and degrees.
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