Geometry ?
Koga Colmaro Extreme Anniversary Edition 2026 geometry in sizes XS–XL: stack 566–629 mm, reach 380–415 mm, head angle 70–72°.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Stack | 566 mm | 577 mm | 587 mm | 610 mm | 629 mm |
| Reach | 380 mm | 390 mm | 400 mm | 405 mm | 415 mm |
| Head angle | 70° | 71° | 71° | 72° | 72° |
| Seat angle | 73.5° | 73.5° | 73.5° | 73.5° | 73.5° |
| Seat tube (?) | 470 mm | 490 mm | 520 mm | 550 mm | 580 mm |
| Head tube | 100 mm | 110 mm | 120 mm | 140 mm | 160 mm |
| BB drop | 75 mm | 75 mm | 75 mm | 75 mm | 75 mm |
| Chainstay | 442 mm | 442 mm | 442 mm | 442 mm | 442 mm |
| Wheelbase | 1044 mm | 1053 mm | 1068 mm | 1073 mm | 1084 mm |
| Fork offset | 51 mm | 51 mm | 51 mm | 51 mm | 51 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: koga.com, 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 XS (stack 566 / reach 380 mm).
Stack and reach within 12 mm of size S (stack 577 / reach 390 mm).
Stack and reach within 12 mm of size M (stack 587 / reach 400 mm).
Stack and reach within 12 mm of size L (stack 610 / reach 405 mm).
Stack and reach within 12 mm of size XL (stack 629 / reach 415 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 7 values for this model’s stem and bars. Add them