2023 Trek FX Gen 3 vs 2025 Kona Sutra
The 50 is the Kona Sutra size closest to your S Trek FX Gen 3. 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 Sutra
Compared with the Trek FX Gen 3 in S, the Kona Sutra in 50 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 12 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +2 mm
- About the same height
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −12 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- −2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek FX Gen 3 numbers we have for size S are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek FX Gen 3 S | Kona Sutra 50 | Difference |
|---|---|---|---|
| Reach | 385 | 380 | −5 mm |
| Stack | 568 | 570 | +2 mm |
| Head tube angle | 70.5° | 70.5 | ±0.0° |
| Effective top tube | 543 | 538 | −5 mm |
| Chainstay length | 447 | 445 | −2 mm |
| Wheelbase | 1059 | 1047 | −12 mm |
| BB drop | 65 | 74 | +9 mm |
| BB height | 285 | 281 | −4 mm |
| Standover | 715 | 770 | +55 mm |
| Seat tube length | 450 | 500 | +50 mm |
| Head tube length | 140 | 125 | −15 mm |
| Seat tube angle | not listed | 74.5 | |
| Fork length | not listed | 415 |
Differences are the Kona Sutra minus the Trek FX Gen 3. Full charts: 2023 Trek FX Gen 3, 2025 Kona Sutra.
Where each sits in its class
Trek FX Gen 3Kona Sutra
Each bike is ranked against the other gravel 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 | Trek FX Gen 31 Gen 3 | Kona SutraSutra |
|---|---|---|
| Frame | Trek Alpha Gold | Kona Cromoly Butted |
| Fork | Trek FX | Kona Project Two |
| Shifter | Shimano Altus EF500 | microSHIFT Sword |
| Derailleur | Shimano Tourney TY510, Shimano Acera M310 | microSHIFT SWORD |
| Cassette | SunRace MFM300 | microSHIFT SWORD |
| Chain | KMC Z7 | KMC X10 |
| Bottom bracket | VP BC73 | Prowheel BB68+ |
| Tire | Bontrager H2 | Schwalbe Marathon Mondial |
| Hub | Formula FM21, Formula FM31 | not listed |
| Rim | Bontrager Connection | not listed |
| Crankset | not listed | PROWHEEL |
| Chainring | not listed | Prowheel |
| Wheelset | not listed | WTB ST i23 TCS 2.0 |
| Brake | not listed | TRP HDC711C |
| Rotor | not listed | TRP TR |
| Handlebar | not listed | Kona Road |
| Stem | not listed | Kona Road |
| Grips | not listed | Brooks Microfiber |
| Headset | not listed | FSA No.1/No.10 |
| Seatpost | not listed | Kona Deluxe Thumb |
| Saddle | not listed | Brooks B17 |
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