2026 Ibis Oso S vs 2025 Kona Process
The XL is the Kona Process size closest to your L Ibis Oso S. 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 Kona Process
Compared with the Ibis Oso S in L, the Kona Process in XL places the top of the head tube 9 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 38 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- −38 mm
- Shorter: quicker to change direction
- Head angle
- +1.1°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Ibis Oso S is drawn. The Kona Process numbers we have for size XL are missing the chainstay length.
Geometry side by side
| Measurement | Ibis Oso S L | Kona Process XL | Difference |
|---|---|---|---|
| Reach | 513 | 515 | +2 mm |
| Stack | 644 | 635 | −9 mm |
| Head tube angle | 64.4 | 65.5 | +1.1° |
| Seat tube angle | 78.4 | 76.6 | −1.8° |
| Effective top tube | 646 | not listed | |
| Chainstay length | 457 | not listed | |
| Wheelbase | 1307 | 1269 | −38 mm |
| BB drop | 38 | not listed | |
| BB height | 335 | not listed | |
| Standover | 733 | not listed | |
| Seat tube length | 432 | 450 | +18 mm |
| Head tube length | 136 | not listed |
Differences are the Kona Process minus the Ibis Oso S. Full charts: 2026 Ibis Oso S, 2025 Kona Process.
Where each sits in its class
Ibis Oso SKona Process
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 | Ibis Oso SS 90 | Kona Process134 |
|---|---|---|
| Frame | Ibis Oso | Kona Process |
| Fork | RockShox Pike Base | RockShox Recon RL |
| Rear shock | RockShox Deluxe Select+ | RockShox Deluxe Select |
| Shifter | SRAM Eagle 90 Transmission | microSHIFT Advent X |
| Derailleur | SRAM Eagle 90 Transmission | microSHIFT Advent X |
| Cassette | SRAM GX Eagle Transmission | microSHIFT Advent X |
| Chain | SRAM GX Eagle Transmission | not listed |
| Crankset | Race Face Affect R | FSA Comet |
| Chainring | Race Face Affect R | not listed |
| Motor | Bosch Performance Line CX | not listed |
| Battery | Bosch Powertube | not listed |
| Wheelset | Blackbird Send Alloy | Formula ST |
| Tire | Maxxis Assegai, Maxxis Minion DHR II DD | Maxxis Minion DHF, Maxxis Dissector |
| Brake | SRAM Maven Base | SRAM Level |
| Rotor | SRAM CenterLine | SRAM CenterLine |
| Handlebar | Blackbird 35 | Kona XC/BC 35 |
| Stem | Blackbird 35 | Kona XC/BC |
| Grips | Lizard Skins Strata | not listed |
| Headset | Cane Creek 50 | not listed |
| Dropper post | KS Vantage Dropper | TranzX dropper internal routing |
| Saddle | WTB Solano Fusion | WTB Volt |
Know what is on every bike.
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