Geometry ?
Bearclaw Thunderhawk UDH 2026 geometry in sizes 50–62: stack 531–648 mm, reach 363–436 mm, head angle 70.8–71.5°.
| 50 | 52 | 54 | 56 | 58 | 60 | 62 | |
|---|---|---|---|---|---|---|---|
| Stack | 531 mm | 555 mm | 575 mm | 595 mm | 614 mm | 629 mm | 648 mm |
| Reach | 363 mm | 378 mm | 390 mm | 401 mm | 412 mm | 425 mm | 436 mm |
| Head angle | 70.8° | 71° | 71.2° | 71.2° | 71.5° | 71.5° | 71.5° |
| Seat angle | 74.2° | 73.8° | 73.5° | 73.2° | 73° | 72.8° | 72.5° |
| Seat tube (?) | 460 mm | 500 mm | 520 mm | 540 mm | 560 mm | 580 mm | 600 mm |
| Head tube | 90 mm | 115 mm | 135 mm | 155 mm | 175 mm | 190 mm | 210 mm |
| BB drop | 77 mm | 77 mm | 77 mm | 77 mm | 77 mm | 77 mm | 77 mm |
| Chainstay | 430 mm | 430 mm | 430 mm | 430 mm | 430 mm | 430 mm | 430 mm |
| Wheelbase | 996 mm | 1017 mm | 1032 mm | 1051 mm | 1066 mm | 1083 mm | 1102 mm |
| Standover | 753 mm | 784 mm | 804 mm | 823 mm | 842 mm | 858 mm | 877 mm |
| Fork length | 405 mm | 405 mm | 405 mm | 405 mm | 405 mm | 405 mm | 405 mm |
| Fork offset | 49 mm | 49 mm | 49 mm | 49 mm | 49 mm | 49 mm | 49 mm |
| Stock build by size | |||||||
| Cranks | – | – | – | – | – | – | 175 mm |
| Stem | – | – | – | – | – | – | 120 mm |
| Bar width | – | – | – | – | – | – | 460 mm |
| Seatpost setback | – | – | – | – | – | – | 0 mm |
(?) by the seat tube length: the manufacturer doesn’t say whether it’s measured centre to centre (c-c) or centre to top (c-t).
Source: cdn.shopify.com, checked 12 Nov 2026 · bar position: worked out from published data
Stock build
Frames with similar geometry
Stack and reach within 12 mm of size 50 (stack 531 / reach 363 mm).
Stack and reach within 12 mm of size 52 (stack 555 / reach 378 mm).
Stack and reach within 12 mm of size 54 (stack 575 / reach 390 mm).
Stack and reach within 12 mm of size 56 (stack 595 / reach 401 mm).
Stack and reach within 12 mm of size 58 (stack 614 / reach 412 mm).
Stack and reach within 12 mm of size 60 (stack 629 / reach 425 mm).
Stack and reach within 12 mm of size 62 (stack 648 / reach 436 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 13 values for this model’s stem and bars. Add them