2026 Trek Fuel EX Gen 7 vs 2025 YT Jeffsy CORE
The YT Jeffsy CORE size closest to your M is the M. Compare the M instead
What changes on the YT Jeffsy CORE
Compared with the Trek Fuel EX Gen 7 in M, the YT Jeffsy CORE in XXL places the top of the head tube 18 mm higher and 55 mm further forward, relative to the bottom bracket. Its wheelbase is 64 mm longer, which can contribute to stability at speed.
- Frame stack
- +18 mm
- Higher front end
- Frame reach
- +55 mm
- Longer frame reach
- Wheelbase
- +64 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Trek Fuel EX Gen 7, MYT Jeffsy CORE, XXLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX Gen 7 M | YT Jeffsy CORE XXL | Difference |
|---|---|---|---|
| Reach | 460 | 515 | +55 mm |
| Stack | 624 | 642 | +18 mm |
| Head tube angle | 64.5° | 65 | +0.5° |
| Seat tube angle | 78.3° | 77.2 | −1.1° |
| Effective top tube | 583 | not listed | |
| Chainstay length | 437 | 442 | +5 mm |
| Wheelbase | 1225 | 1289 | +64 mm |
| BB drop | 35 | 33 | −2 mm |
| BB height | 339 | not listed | |
| Standover | 744 | not listed | |
| Seat tube length | 400 | not listed | |
| Head tube length | 110 | not listed |
Differences are the YT Jeffsy CORE minus the Trek Fuel EX Gen 7. Full charts: 2026 Trek Fuel EX Gen 7, 2025 YT Jeffsy CORE.
Where each sits in its class
Trek Fuel EX Gen 7YT Jeffsy CORE
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Trek Fuel EX Gen 75 Gen 7 | YT Jeffsy CORECORE 1 |
|---|---|---|
| Frame | Trek Alpha NEXT Platinum | not listed |
| Fork | RockShox Recon | Marzocchi Bomber Z1 |
| Shifter | Shimano Deore M6100 | Shimano Deore |
| Derailleur | Shimano Deore M6100 | Shimano Deore |
| Cassette | Shimano Deore M6100 | Shimano Deore M6100 |
| Chain | Shimano Deore M6100 | not listed |
| Crankset | Shimano MT512 | Shimano Deore M512 |
| Tire | Bontrager Gunnison Elite XR | Maxxis Minion DHF, Maxxis Minion DHR II DD |
| Rotor | Shimano SM-RT10 | not listed |
| Grips | Trek Line | ODI Elite Motion V2.1 |
| Seatpost | TranzX JD-YSI34 | YT Seatpost |
| Saddle | Bontrager Verse | YT Custom Design |
| Rear shock | not listed | Marzocchi Bomber Air |
| Bottom bracket | not listed | Shimano MT501 |
| Wheelset | not listed | Sun Ringlé SR329 Trail Comp |
| Brake | not listed | SRAM DB8 Stealth |
| Handlebar | not listed | YT Handlebar 35 |
| Stem | not listed | YT Stem 35 |
| Headset | not listed | Cane Creek Series 10 |
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