Geometry ?
Principia XO 2026 geometry in sizes 52–60: stack 506.3–607.2 mm, reach 379.8–404.4 mm, head angle 70–73°.
| 52 | 54 | 56 | 58 | 60 | |
|---|---|---|---|---|---|
| Stack | 506.3 mm | 533.4 mm | 560.6 mm | 576.7 mm | 607.2 mm |
| Reach | 379.8 mm | 392 mm | 388.6 mm | 398.7 mm | 404.4 mm |
| Head angle | 70° | 71° | 72° | 72.5° | 73° |
| Seat angle | 74° | 74° | 73° | 73° | 73° |
| Head tube | 100 mm | 125 mm | 150 mm | 165 mm | 195 mm |
| BB drop | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm |
| Chainstay | 420 mm | 420 mm | 420 mm | 420 mm | 420 mm |
| Wheelbase | 1000.3 mm | 1013.2 mm | 1004.4 mm | 1019.9 mm | 1019.9 mm |
| Fork length | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm |
| Fork offset | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
Source: principiabikes.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 52 (stack 506.3 / reach 379.8 mm).
Stack and reach within 12 mm of size 54 (stack 533.4 / reach 392 mm).
Stack and reach within 12 mm of size 56 (stack 560.6 / reach 388.6 mm).
Stack and reach within 12 mm of size 58 (stack 576.7 / reach 398.7 mm).
Stack and reach within 12 mm of size 60 (stack 607.2 / reach 404.4 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