2023 Trek Domane SLR Gen 4 Frameset vs 2025 Specialized Allez Sport
The 49 is the Specialized Allez Sport size closest to your 47 Trek Domane SLR Gen 4 Frameset. 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 Allez Sport
Compared with the Trek Domane SLR Gen 4 Frameset in 47, the Specialized Allez Sport in 49 places the top of the head tube 9 mm higher and 5 mm further back, relative to the bottom bracket.
- Frame stack
- +9 mm
- Higher front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −2 mm
- About the same
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Domane SLR Gen 4 Frameset numbers we have for size 47 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SLR Gen 4 Frameset 47 | Specialized Allez Sport 49 | Difference |
|---|---|---|---|
| Reach | 364 | 359 | −5 mm |
| Stack | 527 | 536 | +9 mm |
| Head tube angle | 71.0° | 70.5 | −0.5° |
| Effective top tube | 509 | 500 | −9 mm |
| Chainstay length | 420 | 420 | ±0 mm |
| Wheelbase | 986 | 984 | −2 mm |
| BB drop | 80 | 77 | −3 mm |
| Standover | 686 | 739 | +53 mm |
| Seat tube length | 420 | 460 | +40 mm |
| Head tube length | 110 | 125 | +15 mm |
| Seat tube angle | not listed | 75.25 | |
| BB height | not listed | 273 | |
| Fork length | not listed | 378 |
Differences are the Specialized Allez Sport minus the Trek Domane SLR Gen 4 Frameset. Full charts: 2023 Trek Domane SLR Gen 4 Frameset, 2025 Specialized Allez Sport.
Where each sits in its class
Trek Domane SLR Gen 4 FramesetSpecialized Allez Sport
Each bike is ranked against the other road 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 Domane SLR Gen 4 FramesetSLR Gen 4 Frameset | Specialized Allez SportSport |
|---|---|---|
| Fork | Trek Domane SLR | Specialized FACT |
| Frame | not listed | Specialized E5 Premium |
| Shifter | not listed | Shimano Tiagra |
| Derailleur | not listed | Shimano Tiagra |
| Cassette | not listed | Shimano Tiagra |
| Chain | not listed | KMC X-10 |
| Crankset | not listed | Praxis Alba |
| Chainring | not listed | Shimano Tiagra, Shimano Claris R200 |
| Wheelset | not listed | Specialized Axis Sport |
| Tire | not listed | Specialized Roadsport |
| Brake | not listed | Shimano Tiagra |
| Handlebar | not listed | Specialized Shallow Drop |
| Saddle | not listed | Specialized Bridge Saddle |
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