2027 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 S places the top of the head tube 11 mm lower and 25 mm further back, relative to the bottom bracket. Its wheelbase is 34 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −11 mm
- Lower front end
- Frame reach
- −25 mm
- Shorter frame reach
- Wheelbase
- −34 mm
- Shorter: quicker to change direction
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Trek Fuel EX Gen 7, MYT Jeffsy CORE, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Fuel EX Gen 7 M | YT Jeffsy CORE S | Difference |
|---|---|---|---|
| Reach | 460 | 435 | −25 mm |
| Stack | 624 | 613 | −11 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 | 437 | ±0 mm |
| Wheelbase | 1225 | 1191 | −34 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: 2027 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 its own type on Quiver (trail and enduro), 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 | YT Jeffsy |
| Fork | RockShox Recon | Marzocchi Bomber Z1 |
| Rear shock | RockShox Deluxe Select | Marzocchi Bomber |
| Shifter | Shimano Deore M6200 | Shimano Deore M6100 |
| Derailleur | Shimano Deore M6200 | Shimano Deore M6100 |
| Cassette | Shimano Deore M6200 | Shimano Deore M6100 |
| Chain | Shimano Deore M6100 | not listed |
| Crankset | Shimano Deore MT520 | Shimano Deore M512 |
| Bottom bracket | Shimano MT501 | Shimano MT501 |
| Wheelset | Bontrager Line TLR 30 | Sun Ringlé SR329 Trail Comp |
| Tire | Bontrager Gunnison | Maxxis Minion DHF, Maxxis Minion DHR II |
| Hub | Shimano TC500 | not listed |
| Rim | Bontrager Line TLR 30 | not listed |
| Brake | Shimano MT200 | SRAM DB8 |
| Rotor | Shimano SM-RT10 | SRAM Centerline |
| Handlebar | Bontrager Comp | YT Handlebar 35 |
| Stem | Bontrager Comp | YT Stem 35 |
| Grips | Trek Line | ODI Elite Motion |
| Headset | FSA Orbit | Cane Creek Series 10 |
| Dropper post | TranzX JD-YSI34 | YT Postman V2 |
| Seatpost | TranzX JD-YSI34 | YT Seatpost |
| Saddle | Bontrager Verse Short | YT Custom |
| Chainring | not listed | Shimano Deore M512 |
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