2025 Trek FX Disc vs 2026 Specialized Diverge Comp Alloy
The 54 is the Specialized Diverge Comp Alloy size closest to your 50 Trek FX Disc. 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 Specialized Diverge Comp Alloy
Compared with the Trek FX Disc in 50, the Specialized Diverge Comp Alloy in 54 places the top of the head tube at about the same height and 6 mm further back, relative to the bottom bracket. Its wheelbase is 29 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −2 mm
- About the same height
- Frame reach
- −6 mm
- Shorter frame reach
- Wheelbase
- −29 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- −17 mm
- Shorter: livelier
The two frames
Trek FX Disc, 50Specialized Diverge Comp Alloy, 54Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek FX Disc 50 | Specialized Diverge Comp Alloy 54 | Difference |
|---|---|---|---|
| Reach | 393.0 | 387 | −6 mm |
| Stack | 594.0 | 592 | −2 mm |
| Head tube angle | 71.0 | 71 | ±0.0° |
| Seat tube angle | 74.0 | 74 | ±0.0° |
| Effective top tube | 563.0 | not listed | |
| Chainstay length | 447.0 | 430 | −17 mm |
| Wheelbase | 1070.0 | 1041 | −29 mm |
| BB drop | 65.0 | 85 | +20 mm |
| BB height | 285.0 | not listed | |
| Standover | 754.0 | 754 | ±0 mm |
| Seat tube length | 420.0 | 470 | +50 mm |
| Head tube length | 165.0 | 116 | −49 mm |
Differences are the Specialized Diverge Comp Alloy minus the Trek FX Disc. Full charts: 2025 Trek FX Disc, 2026 Specialized Diverge Comp Alloy.
Where each sits in its class
Trek FX DiscSpecialized Diverge Comp Alloy
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 Disc3 Disc | Specialized Diverge Comp Alloy4 Comp Alloy |
|---|---|---|
| Frame | Trek Alpha Gold Aluminum | Specialized Diverge |
| Fork | Trek FX | Specialized Future Shock 3.1 |
| Shifter | Shimano CUES U6000 | SRAM Apex |
| Derailleur | Shimano CUES U6000 GS | SRAM Eagle Apex |
| Cassette | Shimano LG300 | SRAM SX Eagle |
| Chain | Shimano LG500 | SRAM NX Eagle |
| Crankset | Prowheel Alloy | SRAM Apex |
| Chainring | Prowheel 40T narrow-wide | not listed |
| Pedals | Bontrager City | not listed |
| Wheelset | Bontrager Tubeless Ready Disc | DT Swiss G540 |
| Tire | Bontrager H2 | Specialized Tracer |
| Hub | Formula DC-20 front, Formula DC-22 rear | not listed |
| Rim | Bontrager Tubeless Ready Disc | not listed |
| Brake | Shimano UR300 | SRAM Apex, SRAM Apex AXS |
| Rotor | Shimano SM-RT26 | not listed |
| Handlebar | Bontrager Satellite Plus | Specialized Hover |
| Stem | Bontrager Comp | Specialized Future |
| Grips | Bontrager Satellite IsoZone Plus | Supacaz Suave |
| Seatpost | Alloy | Specialized Alloy |
| Saddle | Bontrager H1 | Specialized Power Sport |
| Bottom bracket | not listed | SRAM DUB |
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