2027 Trek FX vs 2026 Surly Preamble Flat Bar
The Surly Preamble Flat Bar size closest to your M is the L. Compare the L instead
What changes on the Surly Preamble Flat Bar
Compared with the Trek FX in M, the Surly Preamble Flat Bar in XL places the top of the head tube 49 mm higher and 28 mm further forward, relative to the bottom bracket. Its wheelbase is 15 mm longer, which can contribute to stability at speed.
- Frame stack
- +49 mm
- Higher front end
- Frame reach
- +28 mm
- Longer frame reach
- Wheelbase
- +15 mm
- Longer: steadier at speed
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- −12 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek FX numbers we have for size M are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek FX M | Surly Preamble Flat Bar XL | Difference |
|---|---|---|---|
| Reach | 393 | 421 | +28 mm |
| Stack | 594 | 643 | +49 mm |
| Head tube angle | 71.0° | 72 | +1.0° |
| Effective top tube | 563 | 630 | +67 mm |
| Chainstay length | 447 | 435 | −12 mm |
| Wheelbase | 1070 | 1085 | +15 mm |
| BB drop | 65 | 66 | +1 mm |
| BB height | 285 | not listed | |
| Standover | 754 | 901 | +147 mm |
| Seat tube length | 420 | 645 | +225 mm |
| Head tube length | 165 | 210 | +45 mm |
| Seat tube angle | not listed | 72 | |
| Fork length | not listed | 400 |
Differences are the Surly Preamble Flat Bar minus the Trek FX. Full charts: 2027 Trek FX, 2026 Surly Preamble Flat Bar.
Where each sits in its class
Trek FXSurly Preamble Flat Bar
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 FX2 | Surly Preamble Flat BarFlat Bar |
|---|---|---|
| Fork | Trek FX | not listed |
| Shifter | Shimano CUES U4000 | microSHIFT Acolyte Xpress |
| Derailleur | Shimano CUES U4000 | microSHIFT RD-M5185M |
| Cassette | Shimano LINKGLIDE LG300 | not listed |
| Tire | Bontrager H2 Comp | Kenda Kwik Tendril |
| Rotor | Tektro Wave | not listed |
| Frame | not listed | Surly Preamble |
| Chain | not listed | KMC Z8.3 |
| Brake | not listed | Avid BB5 |
| Saddle | not listed | Selle Italia X |
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