2021 Jamis · MD
2021 Jamis Portal 3VO A geometry
Full frame geometry for the 2021 Jamis Portal 3VO A, 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) | Standover (mm) | BB drop (mm) | Chainstay (mm) | Wheelbase (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| XS/14.5 | 597 | 397 | 74.5 | 67.5 | 95 | 560 | 731 | 33 | 437 | 1122 |
| S/15.5 | 606 | 418 | 74.5 | 67.5 | 105 | 585 | 754 | 33 | 437 | 1148 |
| M/17 | 615 | 439 | 74.5 | 67.5 | 115 | 610 | 749 | 33 | 437 | 1173 |
| L/19 | 625 | 461 | 74.5 | 67.5 | 125 | 635 | 754 | 33 | 437 | 1198 |
| XL/21 | 634 | 482 | 74.5 | 67.5 | 135 | 660 | 774 | 33 | 437 | 1224 |
All measurements in millimetres unless marked (°) for angles.