2026 Trek Fuel LX Gen 7 vs 2026 Forbidden Heathen Framekit
The Forbidden Heathen Framekit size closest to your M is the S2. Compare the S2 instead
What changes on the Forbidden Heathen Framekit
Compared with the Trek Fuel LX Gen 7 in M, the Forbidden Heathen Framekit in S4 places the top of the head tube 15 mm higher and 47 mm further forward, relative to the bottom bracket. Its wheelbase is 34 mm longer, which can contribute to stability at speed.
- Frame stack
- +15 mm
- Higher front end
- Frame reach
- +47 mm
- Longer frame reach
- Wheelbase
- +34 mm
- Longer: steadier at speed
- Head angle
- +0.6°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Trek Fuel LX Gen 7 is drawn. The Forbidden Heathen Framekit numbers we have for size S4 are missing the chainstay length.
Geometry side by side
| Measurement | Trek Fuel LX Gen 7 M | Forbidden Heathen Framekit S4 | Difference |
|---|---|---|---|
| Reach | 448 | 495 | +47 mm |
| Stack | 633 | 648 | +15 mm |
| Head tube angle | 63.4° | 64 | +0.6° |
| Seat tube angle | 77.2° | 76 | −1.2° |
| Effective top tube | 586 | 657 | +71 mm |
| Chainstay length | 437 | not listed | |
| Wheelbase | 1237 | 1270.6 | +34 mm |
| BB drop | 27 | not listed | |
| BB height | 347 | 311 | −36 mm |
| Standover | 754 | 764 | +10 mm |
| Seat tube length | 400 | 470 | +70 mm |
| Head tube length | 110 | 120 | +10 mm |
| Fork length | not listed | 541 |
Differences are the Forbidden Heathen Framekit minus the Trek Fuel LX Gen 7. Full charts: 2026 Trek Fuel LX Gen 7, 2026 Forbidden Heathen Framekit.
Where each sits in its class
Trek Fuel LX Gen 7Forbidden Heathen Framekit
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
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