Geometry ?
Bisan Unique 2026 geometry in sizes 47 cm–57 cm: stack 505.1–558.4 mm, reach 365.2–409.5 mm, head angle 71.5–72.5°.
| 47 cm | 51 cm | 53 cm | 57 cm | |
|---|---|---|---|---|
| Stack | 505.1 mm | 517.1 mm | 537.6 mm | 558.4 mm |
| Reach | 365.2 mm | 381.8 mm | 396.2 mm | 409.5 mm |
| Head angle | 71.5° | 72° | 72° | 72.5° |
| Seat angle | 74.5° | 74° | 74° | 73° |
| Head tube | 95 mm | 108.5 mm | 130 mm | 150 mm |
| BB drop | 68 mm | 68 mm | 68 mm | 68 mm |
| Chainstay | 408 mm | 408 mm | 408 mm | 408 mm |
| Wheelbase | 966.5 mm | 982.7 mm | 1003.3 mm | 1018.3 mm |
Source: en.bisan.com.tr, checked 13 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 47 cm (stack 505.1 / reach 365.2 mm).
Stack and reach within 12 mm of size 51 cm (stack 517.1 / reach 381.8 mm).
Stack and reach within 12 mm of size 53 cm (stack 537.6 / reach 396.2 mm).
Stack and reach within 12 mm of size 57 cm (stack 558.4 / reach 409.5 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