2019 Specialized Sirrus Women's Sport vs 2021 Trek FX Sport
The S is the Trek FX Sport size closest to your XS Specialized Sirrus Women's Sport. 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
Compared with the Specialized Sirrus Women's Sport in XS, the Trek FX Sport in S places the top of the head tube 21 mm higher and 23 mm further forward, relative to the bottom bracket. Its wheelbase is 20 mm longer, which can contribute to stability at speed.
- Frame stack
- +21 mm
- Higher front end
- Frame reach
- +23 mm
- Longer frame reach
- Wheelbase
- +20 mm
- Longer: steadier at speed
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- −2 mm
- About the same
The two frames
Only the Specialized Sirrus Women's Sport is drawn. The Trek FX Sport numbers we have for size S are missing the seat angle.
Geometry side by side
| Measurement | Specialized Sirrus Women's Sport XS | Trek FX Sport S | Difference |
|---|---|---|---|
| Reach | 372mm | 395 | +23 mm |
| Stack | 537mm | 558 | +21 mm |
| Head tube angle | 69.5° | 70.5° | +1.0° |
| Seat tube angle | 73.5° | not listed | |
| Effective top tube | 531mm | 550 | +19 mm |
| Chainstay length | 440mm | 438 | −2 mm |
| Wheelbase | 1036mm | 1056 | +20 mm |
| BB drop | 70mm | 65 | −5 mm |
| BB height | 275mm | 285 | +10 mm |
| Standover | 690mm | 712 | +22 mm |
| Seat tube length | 345mm | 406 | +61 mm |
| Fork length | 390mm | not listed | |
| Head tube length | 126mm | 135 | +9 mm |
Differences are the Trek FX Sport minus the Specialized Sirrus Women's Sport. Full charts: 2019 Specialized Sirrus Women's Sport, 2021 Trek FX Sport.
Where each sits in its class
Specialized Sirrus Women's SportTrek FX Sport
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 Women's SportWomen's Sport | Trek FX Sport5 |
|---|---|---|
| Derailleur | microSHIFT R9, Shimano Sora | Shimano Tiagra 4700 |
| Cassette | Shimano Sora | Shimano Tiagra HG-500 |
| Chain | KMC X9 | KMC X10 |
| Crankset | Specialized 2-piece | Shimano Tiagra 4700 |
| Tire | Specialized Nimbus II Sport Reflect | Bontrager R1 Hard-Case Lite |
| Brake | Tektro HD-R310 | Shimano MT201 |
| Grips | Specialized Contour | not listed |
| Saddle | Specialized Aldia Sport | Bontrager Montrose |
| Frame | not listed | Trek OCLV |
| Fork | not listed | Trek FX |
| Shifter | not listed | Shimano Tiagra 4700 |
| Bottom bracket | not listed | Shimano BB71 |
| Rim | not listed | Bontrager Affinity |
| Handlebar | not listed | Bontrager Satellite Plus IsoZone |
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