2019 Specialized Sirrus Women's Elite Step-Through Alloy vs 2021 Trek FX Sport
The S is the Trek FX Sport size closest to your M Specialized Sirrus Women's Elite Step-Through Alloy. 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 Elite Step-Through Alloy in M, the Trek FX Sport in S places the top of the head tube 3 mm lower and 12 mm further forward, relative to the bottom bracket. Its wheelbase is 16 mm longer, which can contribute to stability at speed.
- Frame stack
- −3 mm
- Lower front end
- Frame reach
- +12 mm
- Longer frame reach
- Wheelbase
- +16 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- −2 mm
- About the same
The two frames
Only the Specialized Sirrus Women's Elite Step-Through Alloy 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 Elite Step-Through Alloy M | Trek FX Sport S | Difference |
|---|---|---|---|
| Reach | 383mm | 395 | +12 mm |
| Stack | 561mm | 558 | −3 mm |
| Head tube angle | 71° | 70.5° | −0.5° |
| Seat tube angle | 73.5° | not listed | |
| Effective top tube | 549mm | 550 | +1 mm |
| Chainstay length | 440mm | 438 | −2 mm |
| Wheelbase | 1040mm | 1056 | +16 mm |
| BB drop | 70mm | 65 | −5 mm |
| BB height | 275mm | 285 | +10 mm |
| Standover | 625mm | 712 | +87 mm |
| Seat tube length | 450mm | 406 | −44 mm |
| Fork length | 390mm | not listed | |
| Head tube length | 146mm | 135 | −11 mm |
Differences are the Trek FX Sport minus the Specialized Sirrus Women's Elite Step-Through Alloy. Full charts: 2019 Specialized Sirrus Women's Elite Step-Through Alloy, 2021 Trek FX Sport.
Where each sits in its class
Specialized Sirrus Women's Elite Step-Through AlloyTrek 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 Elite Step-Through AlloyWomen's Elite Step-Through Alloy | Trek FX Sport5 |
|---|---|---|
| Derailleur | microSHIFT Centos, Shimano Tiagra | Shimano Tiagra 4700 |
| Cassette | Shimano Tiagra | Shimano Tiagra HG-500 |
| Chain | KMC X-10 | KMC X10 |
| Crankset | Praxis Alba M24 | Shimano Tiagra 4700 |
| Bottom bracket | Praxis M24 | Shimano BB71 |
| Tire | Specialized Espoir Sport Reflect | Bontrager R1 Hard-Case Lite |
| Brake | TRP Flow | Shimano MT201 |
| Stem | Specialized Flowset | not listed |
| Saddle | Specialized Aldia Comp | Bontrager Montrose |
| Frame | not listed | Trek OCLV |
| Fork | not listed | Trek FX |
| Shifter | not listed | Shimano Tiagra 4700 |
| Rim | not listed | Bontrager Affinity |
| Handlebar | not listed | Bontrager Satellite Plus IsoZone |
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