Bird Forge 2021


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Geometry

  Medium Medium Long Large Extra Large (unsagged) Extra Large
To view geometry data you must use a web browser that supports JavaScript. See: browser-update.org
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Reach 428 514 565 403 504
Stack 778 634 613 809 643
Top Tube (effective) 560 682 779 675 810
Seat Tube C-T 332 364 367 480
Seat Tube (effective) 75 91 68 66
Head Angle 54 67 76 52 64
Seat Angle 68 64 84 85 79
Head Tube 111 113 128 126 104
Chainstay 490 475 451 376 516
Wheelbase 1093 1109 1313 1244 1411
BB Drop 77 100 92 73 76
BB Height 341 325 297 332 247
BB Type 73mm BSA Threaded 73mm BSA Threaded 73mm BSA Threaded 73mm BSA Threaded 73mm BSA Threaded
Fork Rake / Offset 34 36 39 46 35
Fork Length (A2C) 474 432 430 589
Seatpost Diameter 34 36 30 27 36
Wheel Size 25 23 32 30 30
Front Travel 161 147 125 138 121
Headset EC34 / EC44 EC34 / EC44 EC34 / EC44 EC34 / EC44 EC34 / EC44
Seat Clamp 37 40 40 29 38
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.

Image showing geometry measurements

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