2026
2026 Trek Top Fuel 9.8 Gen 4
Reach 422 to 512 mm, stack 566 to 626 mm. The Top Fuel 9.8 XT Di2 Gen 4 build comes with Bontrager Line Comp 30 wheels.
Source: trekbikes.com. Checked .
Key facts
- Brand
- Trek
- Model
- Top Fuel
- Model year
- 2026
- Frame
- 9.8 Gen 4
- Geometry labels
- S, M, ML, L, and XL
- Wheels
- Bontrager Line Comp 30
- Geometry
- Complete for every size
- Source
- trekbikes.com
- Checked
Geometry by size
| Measurement | S | M | ML | L | XL |
|---|---|---|---|---|---|
| Reach(mm) | 422 | 452 | 467 | 482 | 512 |
| Stack(mm) | 566 | 599 | 604 | 608 | 626 |
| Head tube angle(°) | 65.9 | 65.9 | 65.9 | 65.9 | 65.9 |
| Seat tube angle(°) | 76.5 | 77.3 | 76.6 | 76.3 | 75.6 |
| Effective top tube(mm) | 558 | 587 | 611 | 630 | 672 |
| Chainstay length(mm) | 434 | 434 | 439 | 439 | 444 |
| Wheelbase(mm) | 1150 | 1188 | 1210 | 1227 | 1270 |
| BB drop(mm) | 10 | 26 | 26 | 26 | 26 |
| BB height(mm) | 351 | 354 | 354 | 354 | 354 |
| Standover(mm) | 705 | 755 | 757 | 758 | 763 |
| Seat tube length(mm) | 360 | 410 | 420 | 435 | 470 |
| Head tube length(mm) | 105 | 105 | 110 | 115 | 135 |
Stock build
4 parts
Suspension
RockShox Pike Select+
Wheels & Tires
Cockpit
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Quick answers
- Which size or configuration labels have geometry for the 2026 Trek Top Fuel 9.8 Gen 4?
- Geometry is listed for S, M, ML, L, and XL.
- What are the reach and stack of the 2026 Trek Top Fuel 9.8 Gen 4 in size ML?
- In size ML, reach is 467 mm and stack is 604 mm.
- What is the head tube angle of the 2026 Trek Top Fuel 9.8 Gen 4?
- The head tube angle is 65.9 degrees in every size.
- What does the 2026 Trek Top Fuel 9.8 XT Di2 Gen 4 ship with?
- The stock build includes RockShox Pike Select+, Bontrager Line Comp 30, and Bontrager Line Pro OCLV.
- Which years of the Trek Top Fuel are on Quiver?
- Quiver has the Trek Top Fuel for 2026, 2027, 2025, 2024, 2021, 2020, 2019, 2018, 2017, 2016, 2011, and 2010.
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