2025
2025 YT Jeffsy CORE
The 2025 YT Jeffsy CORE sits at the aggressive end of the range for a trail bike, with a shorter rear center. Reach 435 to 515 mm, stack 613 to 642 mm. The Jeffsy CORE 1 build comes with Shimano Deore shifting and Sun Ringlé SR329 Trail Comp wheels.
Source: yt-industries.com. Checked .
Key facts
- Brand
- YT
- Model
- Jeffsy
- Model year
- 2025
- Frame
- CORE
- Type
- Trail
- Geometry labels
- S, M, L, XL, and XXL
- Drivetrain
- Varies by build
- Fork
- Varies by build
- Rear shock
- Varies by build
- Wheels
- Varies by build
- Geometry
- Complete for every size
- Source
- yt-industries.com
- Checked
Geometry by size
| Measurement | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| Reach(mm) | 435 | 455 | 475 | 495 | 515 |
| Stack(mm) | 613 | 620 | 627 | 634 | 642 |
| Head tube angle(°) | 65 | 65 | 65 | 65 | 65 |
| Seat tube angle(°) | 77.2 | 77.2 | 77.2 | 77.2 | 77.2 |
| Chainstay length(mm) | 437 | 437 | 437 | 442 | 442 |
| Wheelbase(mm) | 1191 | 1214 | 1238 | 1266 | 1289 |
| BB drop(mm) | 33 | 33 | 33 | 33 | 33 |
Stock build
Jeffsy CORE 1
Suspension
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
Keep your Jeffsy CORE 1 in Quiver
Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.
Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.Already have Quiver? Open this build
Jeffsy CORE 2
Frame
Suspension
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
Keep your Jeffsy CORE 2 in Quiver
Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.
Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.Already have Quiver? Open this build
Jeffsy CORE 3
Frame
Suspension
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
Keep your Jeffsy CORE 3 in Quiver
Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.
Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.Already have Quiver? Open this build
Jeffsy CORE 4
Frame
Suspension
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
Keep your Jeffsy CORE 4 in Quiver
Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.
Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.Already have Quiver? Open this build
Jeffsy CORE 5
Frame
Suspension
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
Keep your Jeffsy CORE 5 in Quiver
Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.
Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.Already have Quiver? Open this build
✓Sources agreeMManufacturer
Quick answers
- Which size or configuration labels have geometry for the 2025 YT Jeffsy CORE?
- Geometry is listed for S, M, L, XL, and XXL.
- What are the reach and stack of the 2025 YT Jeffsy CORE in size L?
- In size L, reach is 475 mm and stack is 627 mm.
- What is the head tube angle of the 2025 YT Jeffsy CORE?
- The head tube angle is 65 degrees in every size.
- What does the 2025 YT Jeffsy CORE 1 ship with?
- The stock build includes Marzocchi Bomber Z1, Shimano Deore, Sun Ringlé SR329 Trail Comp, and SRAM DB8 Stealth.
- Which years of the YT Jeffsy are on Quiver?
- Quiver has the YT Jeffsy for 2025.
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