CNF Rear Geometry
Vicente Pattern Tuning Matrix
Engineering targets for seat ease, thigh ease, yoke angle, rise curve, and tension thresholds calibrated to the Vicente cohort.
6.1 Geometry Targets
| Metric | Target | Tolerance |
|---|---|---|
| Projection | 27.5 mm | ±4 mm |
| Curvature | 0.91 | ±0.12 |
| Contour stability | ≥ 0.90 | — |
6.2 Pattern Parameters
| Parameter | Base | Range | Notes |
|---|---|---|---|
| Seat ease | 14 mm | 12–16 mm | Controls upper-seat tension |
| Thigh ease | 10 mm | 8–12 mm | Controls side-seam tension |
| Yoke angle | 18° | 16–20° | Controls rear curvature support |
| Rise curve | mid | ±0.03 curvature | Controls projection support |
6.3 Tension Targets
| Zone | Max Tension |
|---|---|
| Upper seat | 0.15 |
| Side seam | 0.18 |
| Thigh | 0.16 |
6.4 Levi's Cut Engineering Notes
| Cut | Projection Match | Curvature Match | Tension Risk | Verdict |
|---|---|---|---|---|
| 501 | High | High | Low | Ideal baseline |
| 513 | High | High | Low | Best comfort–structure balance |
| 514 | High | High | Low | Best for cohort stability |
| 511 | Medium | Medium | Upper-seat | Needs +1 size or pattern tuning |
| 541 | Medium | Medium | Side-seam | Needs thigh ease tuning |