Geometry ?
Chapter2 Koko 2026 geometry in sizes XXS–XL: stack 466–591 mm, reach 356–401 mm, head angle 70–73.5°.
| XXS | XS | S | M | L | XL | |
|---|---|---|---|---|---|---|
| Stack | 466 mm | 491 mm | 516 mm | 540 mm | 566 mm | 591 mm |
| Reach | 356 mm | 365 mm | 374 mm | 382 mm | 392 mm | 401 mm |
| Head angle | 70° | 70.5° | 72.2° | 73.1° | 73.5° | 73.5° |
| Seat angle | 74° | 73° | 73° | 73° | 73° | 73° |
| Seat tube (?) | 425 mm | 427 mm | 447 mm | 472 mm | 497 mm | 521 mm |
| Head tube | 70 mm | 94 mm | 114 mm | 133 mm | 163 mm | 188 mm |
| Top tube (effective) | 490 mm | 515 mm | 531 mm | 548 mm | 564 mm | 581 mm |
| BB drop | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm |
| Chainstay | 408 mm | 408 mm | 408 mm | 408 mm | 408 mm | 408 mm |
| Wheelbase | 957 mm | 970 mm | 973 mm | 971 mm | 984 mm | 1000 mm |
| Standover | 693 mm | 708 mm | 730 mm | 755 mm | 780 mm | 805 mm |
| Fork offset | 53 mm | 53 mm | 53 mm | 43 mm | 43 mm | 43 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: chapter2bikes.com, 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 XXS (stack 466 / reach 356 mm).
Stack and reach within 12 mm of size XS (stack 491 / reach 365 mm).
Stack and reach within 12 mm of size S (stack 516 / reach 374 mm).
Stack and reach within 12 mm of size M (stack 540 / reach 382 mm).
Stack and reach within 12 mm of size L (stack 566 / reach 392 mm).
Stack and reach within 12 mm of size XL (stack 591 / reach 401 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 8 values for this model’s stem and bars. Add them