Bird Forge 2021
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Geometry
| Medium | Medium Long | Large | Extra Large (unsagged) | Extra Large | |
|---|---|---|---|---|---|
| Add to Compare | |||||
| Reach | 470 | 402 | 488 | 398 | 476 |
| Stack | 736 | 678 | 767 | 640 | 609 |
| Top Tube (effective) | 590 | 519 | 637 | 612 | 670 |
| Seat Tube C-T | 473 | 358 | 409 | 408 | |
| Seat Tube (effective) | 89 | 68 | 62 | 90 | |
| Head Angle | 74 | 69 | 52 | 72 | 57 |
| Seat Angle | 80 | 69 | 61 | 64 | 79 |
| Head Tube | 119 | 94 | 127 | 128 | 123 |
| Chainstay | 395 | 491 | 400 | 505 | 421 |
| Wheelbase | 1369 | 1321 | 1463 | 1311 | 1111 |
| BB Drop | 81 | 88 | 82 | 84 | 94 |
| BB Height | 342 | 318 | 258 | 287 | 332 |
| BB Type | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded | 73mm BSA Threaded |
| Fork Rake / Offset | 48 | 45 | 42 | 34 | 46 |
| Fork Length (A2C) | 414 | 446 | 551 | 536 | |
| Seatpost Diameter | 27 | 37 | 28 | 31 | 36 |
| Wheel Size | 32 | 26 | 27 | 25 | 29 |
| Front Travel | 123 | 151 | 112 | 123 | 140 |
| Headset | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 | EC34 / EC44 |
| Seat Clamp | 34 | 29 | 34 | 32 | 34 |
| 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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