2026 Trek · MDB
2026 Trek Top Fuel Gen 4 geometry
Full frame geometry for the 2026 Trek Top Fuel Gen 4, 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) | Standover (mm) | BB drop (mm) | Front centre (mm) | Chainstay (mm) | Wheelbase (mm) | Fork rake (mm) | Trail (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S-High | 566 | 422 | 76.5 | 65.9 | 105 | 558 | 360 | 705 | 10 | 717 | 434 | 1150 | 43 | 111 |
| S-Low | 570 | 417 | 76 | 65.5 | 105 | 559 | 360 | 700 | 16 | 717 | 435 | 1151 | 43 | 115 |
| M-High | 599 | 452 | 77.3 | 65.9 | 105 | 587 | 410 | 755 | 26 | 755 | 434 | 1188 | 43 | 121 |
| M-Low | 603 | 447 | 76.9 | 65.5 | 105 | 588 | 410 | 750 | 32 | 755 | 435 | 1188 | 43 | 125 |
| ML-High | 604 | 467 | 76.6 | 65.9 | 110 | 611 | 420 | 757 | 26 | 772 | 439 | 1210 | 43 | 121 |
| ML-Low | 607 | 462 | 76.2 | 65.5 | 110 | 612 | 420 | 752 | 32 | 772 | 440 | 1210 | 43 | 125 |
| L-High | 608 | 482 | 76.3 | 65.9 | 115 | 630 | 435 | 758 | 26 | 789 | 439 | 1227 | 43 | 121 |
| L-Low | 612 | 477 | 75.9 | 65.5 | 115 | 631 | 435 | 753 | 32 | 789 | 440 | 1227 | 43 | 125 |
| XL-High | 626 | 512 | 75.6 | 65.9 | 135 | 672 | 470 | 763 | 26 | 827 | 444 | 1270 | 43 | 121 |
| XL-Low | 630 | 507 | 75.2 | 65.5 | 135 | 673 | 470 | 758 | 32 | 827 | 445 | 1271 | 43 | 125 |
All measurements in millimetres unless marked (°) for angles.