2025 Kona Process vs 2026 Marin Rift Zone
The M is the Marin Rift Zone size closest to your M 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 Marin Rift Zone
Compared with the Kona Process in M, the Marin Rift Zone in M places the top of the head tube 10 mm lower and 5 mm further back, relative to the bottom bracket. Its wheelbase is 13 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −10 mm
- Lower front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −13 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- 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 M are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Kona Process M | Marin Rift Zone M | Difference |
|---|---|---|---|
| Reach | 455 | 450 | −5 mm |
| Stack | 615 | 605.2 | −10 mm |
| Head tube angle | 65.5 | 65.5 | ±0.0° |
| Seat tube angle | 76.9 | 77 | +0.1° |
| Wheelbase | 1200 | 1186.9 | −13 mm |
| Seat tube length | 380 | 400 | +20 mm |
| Effective top tube | not listed | 589.7 | |
| Chainstay length | not listed | 430 | |
| BB drop | not listed | not listed | |
| BB height | not listed | 339 | |
| Standover | not listed | not listed | |
| Head tube length | not listed | 125 |
Differences are the Marin Rift Zone minus the Kona Process. Full charts: 2025 Kona Process, 2026 Marin Rift Zone.
Where each sits in its class
Kona ProcessMarin Rift Zone
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 | Marin Rift Zone2 |
|---|---|---|
| Frame | Kona Process | Marin Rift Zone |
| Fork | RockShox Recon RL | Marzocchi Bomber Z2 |
| Rear shock | RockShox Deluxe Select | Marzocchi Bomber Air inline |
| Shifter | microSHIFT Advent X | Shimano Deore |
| Derailleur | microSHIFT Advent X | Shimano Deore |
| Cassette | microSHIFT Advent X | Shimano Deore M6100 |
| Crankset | FSA Comet | Marin forged alloy, 30T narrow-wide, 165mm |
| Wheelset | Formula ST | Marin double-wall alloy, 29mm inner, 32-hole, tubeless-compatible |
| Tire | Maxxis Minion DHF, Maxxis Dissector | Maxxis Assegai |
| Brake | SRAM Level | Tektro M5140 |
| Rotor | SRAM CenterLine | Tektro 180mm front, 160mm rear |
| Handlebar | Kona XC/BC 35 | Marin mini-riser |
| Stem | Kona XC/BC | not listed |
| Dropper post | TranzX dropper internal routing | TranzX YSI60QL |
| Saddle | WTB Volt | Marin Speed Concept |
| Chain | not listed | KMC X-12 |
| Chainring | not listed | Marin 30T narrow-wide |
| Bottom bracket | not listed | External sealed cartridge |
| Grips | not listed | Marin Grizzly |
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