2024 Specialized Sirrus X 2.0 vs 2026 Trek FX Sport SL
The XS is the Trek FX Sport SL size closest to your XS Specialized Sirrus X 2.0. 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 Trek FX Sport SL
Compared with the Specialized Sirrus X 2.0 in XS, the Trek FX Sport SL in XS places the top of the head tube 12 mm lower and 5 mm further back, relative to the bottom bracket. Its wheelbase is 6 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −12 mm
- Lower front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −6 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +2 mm
- About the same
The two frames
Only the Specialized Sirrus X 2.0 is drawn. The Trek FX Sport SL numbers we have for size XS are missing the seat angle.
Geometry side by side
| Measurement | Specialized Sirrus X 2.0 XS | Trek FX Sport SL XS | Difference |
|---|---|---|---|
| Reach | 388mm | 383 | −5 mm |
| Stack | 555mm | 543 | −12 mm |
| Head tube angle | 70° | 70.0° | ±0.0° |
| Seat tube angle | 73.5° | not listed | |
| Chainstay length | 440mm | 442 | +2 mm |
| Wheelbase | 1053mm | 1047 | −6 mm |
| Standover | 725mm | 708 | −17 mm |
| Seat tube length | 395mm | 356 | −39 mm |
| Fork length | 395mm | not listed | |
| Head tube length | 139mm | 115 | −24 mm |
| Effective top tube | not listed | 528 | |
| BB drop | not listed | 65 | |
| BB height | not listed | 285 |
Differences are the Trek FX Sport SL minus the Specialized Sirrus X 2.0. Full charts: 2024 Specialized Sirrus X 2.0, 2026 Trek FX Sport SL.
Where each sits in its class
Specialized Sirrus X 2.0Trek FX Sport SL
Each bike is ranked against the other commuter 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 | Specialized Sirrus X 2.02.0 | Trek FX Sport SL |
|---|---|---|
| Shifter | microSHIFT Acolyte | not listed |
| Derailleur | microSHIFT Acolyte | not listed |
| Cassette | microSHIFT Acolyte CS-H084 | not listed |
| Chain | KMC X8 | not listed |
| Tire | Specialized Pathfinder Sport | not listed |
| Brake | Promax F1 | not listed |
| Grips | Specialized Neutralizer | not listed |
| Saddle | Specialized Bridge Sport | not listed |
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