2025 Kona Process vs 2025 YT Jeffsy CORE
The L is the YT Jeffsy CORE size closest to your L Kona Process. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the YT Jeffsy CORE
Compared with the Kona Process in L, the YT Jeffsy CORE in L places the top of the head tube at about the same height and 5 mm further back, relative to the bottom bracket. Its wheelbase is 8 mm longer, which can contribute to stability at speed.
- Frame stack
- +2 mm
- About the same height
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- +8 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Kona Process numbers we have for size L are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Kona Process L | YT Jeffsy CORE L | Difference |
|---|---|---|---|
| Reach | 480 | 475 | −5 mm |
| Stack | 625 | 627 | +2 mm |
| Head tube angle | 65.5 | 65 | −0.5° |
| Seat tube angle | 76.7 | 77.2 | +0.5° |
| Wheelbase | 1230 | 1238 | +8 mm |
| Seat tube length | 420 | not listed | |
| Chainstay length | not listed | 437 | |
| BB drop | not listed | 33 |
Differences are the YT Jeffsy CORE minus the Kona Process. Full charts: 2025 Kona Process, 2025 YT Jeffsy CORE.
Where each sits in its class
Kona ProcessYT 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 | Kona Process134 | YT Jeffsy CORECORE 1 |
|---|---|---|
| Frame | Kona Process | not listed |
| Fork | RockShox Recon RL | Marzocchi Bomber Z1 |
| Rear shock | RockShox Deluxe Select | Marzocchi Bomber Air |
| Shifter | microSHIFT Advent X | Shimano Deore |
| Derailleur | microSHIFT Advent X | Shimano Deore |
| Cassette | microSHIFT Advent X | Shimano Deore M6100 |
| Crankset | FSA Comet | Shimano Deore M512 |
| Wheelset | Formula ST | Sun Ringlé SR329 Trail Comp |
| Tire | Maxxis Minion DHF, Maxxis Dissector | Maxxis Minion DHF, Maxxis Minion DHR II DD |
| Brake | SRAM Level | SRAM DB8 Stealth |
| Rotor | SRAM CenterLine | not listed |
| Handlebar | Kona XC/BC 35 | YT Handlebar 35 |
| Stem | Kona XC/BC | YT Stem 35 |
| Dropper post | TranzX dropper internal routing | not listed |
| Saddle | WTB Volt | YT Custom Design |
| Bottom bracket | not listed | Shimano MT501 |
| Grips | not listed | ODI Elite Motion V2.1 |
| Headset | not listed | Cane Creek Series 10 |
| Seatpost | not listed | YT Seatpost |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
