2021 Specialized Sirrus 3.0 Step Through vs 2020 Trek FX Sport Women's
The S is the Trek FX Sport Women's size closest to your S Specialized Sirrus 3.0 Step Through. 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 Women's
Compared with the Specialized Sirrus 3.0 Step Through in S, the Trek FX Sport Women's in S places the top of the head tube 5 mm lower and 5 mm further back, relative to the bottom bracket. Its wheelbase is 12 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −5 mm
- Lower front end
- Frame reach
- −5 mm
- Shorter frame reach
- Wheelbase
- −12 mm
- Shorter: quicker to change direction
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- −2 mm
- About the same
The two frames
Only the Specialized Sirrus 3.0 Step Through is drawn. The Trek FX Sport Women's numbers we have for size S are missing the seat angle.
Geometry side by side
| Measurement | Specialized Sirrus 3.0 Step Through S | Trek FX Sport Women's S | Difference |
|---|---|---|---|
| Reach | 400mm | 395 | −5 mm |
| Stack | 563mm | 558 | −5 mm |
| Head tube angle | 70° | 70.5° | +0.5° |
| Seat tube angle | 73.5° | not listed | |
| Chainstay length | 440mm | 438 | −2 mm |
| Wheelbase | 1068mm | 1056 | −12 mm |
| Standover | 620mm | 712 | +92 mm |
| Seat tube length | 450mm | 406 | −44 mm |
| Fork length | 395mm | not listed | |
| Head tube length | 147mm | 135 | −12 mm |
| Effective top tube | not listed | 550 | |
| BB drop | not listed | 65 | |
| BB height | not listed | 285 |
Differences are the Trek FX Sport Women's minus the Specialized Sirrus 3.0 Step Through. Full charts: 2021 Specialized Sirrus 3.0 Step Through, 2020 Trek FX Sport Women's.
Where each sits in its class
Specialized Sirrus 3.0 Step ThroughTrek FX Sport Women's
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 3.0 Step Through3.0 Step Through | Trek FX Sport Women's4 Women's |
|---|---|---|
| Derailleur | microSHIFT R9, Shimano Sora | Shimano Tiagra 4700 |
| Cassette | Shimano Sora | Shimano Tiagra HG-500 |
| Chain | KMC X9 | KMC X10 |
| Tire | Specialized RoadSport Reflect | Bontrager R1 Hard-Case Lite |
| Brake | Tektro HD-R280 | Shimano MT201 |
| Saddle | Specialized Bridge Sport | Bontrager H1 |
| Frame | not listed | Trek Alpha |
| Fork | not listed | Trek FX |
| Shifter | not listed | Shimano Tiagra 4700 |
| Crankset | not listed | Shimano R460 |
| Pedals | not listed | Wellgo M141 |
| Handlebar | not listed | Bontrager Satellite Plus IsoZone |
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