Geometry ?
Bisan All Trail 2026 geometry in sizes 50 cm–56 cm: stack 568 mm, reach 376.8–386.8 mm, head angle 71°.
| 50 cm | 52 cm | 54 cm | 56 cm | |
|---|---|---|---|---|
| Stack | 568 mm | 568 mm | 568 mm | 568 mm |
| Reach | 376.8 mm | 376.8 mm | 381.8 mm | 386.8 mm |
| Head angle | 71° | 71° | 71° | 71° |
| Seat angle | 70.3° | 70.3° | 70.3° | 70.3° |
| Seat tube (?) | 500 mm | 520 mm | 540 mm | 560 mm |
| Head tube | 145 mm | 145 mm | 145 mm | 145 mm |
| BB drop | 69 mm | 69 mm | 69 mm | 69 mm |
| Chainstay | 450 mm | 450 mm | 450 mm | 450 mm |
| Wheelbase | 1040.8 mm | 1040.8 mm | 1045.8 mm | 1050.8 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: en.bisan.com.tr, checked 12 Nov 2026 · bar position: worked out from published data
Stock build
I don’t have the build for each size yet.
Frames with similar geometry
Stack and reach within 12 mm of size 50 cm (stack 568 / reach 376.8 mm).
Stack and reach within 12 mm of size 52 cm (stack 568 / reach 376.8 mm).
Stack and reach within 12 mm of size 54 cm (stack 568 / reach 381.8 mm).
Stack and reach within 12 mm of size 56 cm (stack 568 / reach 386.8 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 6 values for this model’s stem and bars. Add them