2026 Trek · G
2026 Trek Checkpoint ALR 4 Gen 3 geometry
Full frame geometry for the 2026 Trek Checkpoint ALR 4 Gen 3, 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) | Chainstay (mm) | Wheelbase (mm) | Fork rake (mm) | Trail (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| XS | 545 | 380 | 74.1 | 71.2 | 96 | 536 | 445 | 78 | 435 | 1025 | 49 | 74 |
| S | 566 | 385 | 73.7 | 71.6 | 117 | 548 | 480 | 78 | 435 | 1033 | 49 | 71 |
| M | 589 | 391 | 73.2 | 71.8 | 140 | 568 | 505 | 76 | 435 | 1041 | 49 | 70 |
| ML | 611 | 397 | 72.8 | 72.2 | 162 | 580 | 530 | 76 | 435 | 1048 | 49 | 67 |
| L | 630 | 402 | 72.5 | 72.3 | 181 | 592 | 550 | 74 | 435 | 1058 | 49 | 66 |
| XL | 650 | 408 | 72.1 | 72.6 | 201 | 604 | 575 | 74 | 435 | 1070 | 49 | 65 |
All measurements in millimetres unless marked (°) for angles.