2015 Principia · R
2015 Principia Aura geometry
Full frame geometry for the 2015 Principia Aura, size by size — stack, reach, angles and tube lengths.
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Geometry by size
| Size | Stack (mm) | Reach (mm) | Seat angle (°) | Head angle (°) | Head tube (mm) | Top tube (mm) | Seat tube (mm) | BB drop (mm) | Front centre (mm) | Wheelbase (mm) | Fork rake (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 51 | 516 | 377 | 74.5 | 72.5 | 110 | 520 | 480 | 70 | 575 | 970 | 43 |
| 53 | 537 | 381 | 74 | 73 | 130 | 535 | 510 | 70 | 584 | 980 | 43 |
| 55 | 556 | 387 | 74 | 73 | 150 | 546 | 545 | 70 | 591 | 987 | 43 |
| 57 | 574 | 395 | 73.5 | 73 | 169 | 565 | 565 | 70 | 604 | 1000 | 43 |
| 59 | 593 | 401 | 73.5 | 73.5 | 187 | 577 | 590 | 70 | 612 | 1008 | 43 |
| 61 | 617 | 406 | 73 | 74 | 210 | 595 | 615 | 70 | 618 | 1014 | 43 |
All measurements in millimetres unless marked (°) for angles.