Geometry ?
Principia XOC 2026 geometry in sizes XS–XL: stack 507.6–595.3 mm, reach 359.7–393.5 mm, head angle 70.2–73°.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Stack | 507.6 mm | 526.6 mm | 548.8 mm | 571.5 mm | 595.3 mm |
| Reach | 359.7 mm | 370 mm | 377.8 mm | 385 mm | 393.5 mm |
| Head angle | 70.2° | 71.5° | 72° | 72.5° | 73° |
| Seat angle | 75.5° | 74.5° | 74.5° | 73.8° | 73° |
| Head tube | 105 mm | 120 mm | 140 mm | 162 mm | 185 mm |
| BB drop | 71 mm | 71 mm | 71 mm | 71 mm | 71 mm |
| Chainstay | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 973.9 mm | 979 mm | 984.2 mm | 993.8 mm | 1004.7 mm |
| Fork length | 376 mm | 376 mm | 376 mm | 376 mm | 376 mm |
| Fork offset | 50 mm | 50 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 XS (stack 507.6 / reach 359.7 mm).
Stack and reach within 12 mm of size S (stack 526.6 / reach 370 mm).
Stack and reach within 12 mm of size M (stack 548.8 / reach 377.8 mm).
Stack and reach within 12 mm of size L (stack 571.5 / reach 385 mm).
Stack and reach within 12 mm of size XL (stack 595.3 / reach 393.5 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 7 values for this model’s stem and bars. Add them