2015 Specialized Sirrus vs 2017 Trek FX Sport Women's
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Trek FX Sport Women's
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- −70 mm
- Shorter: quicker to change direction
- Head angle
- −0.2°
- About the same head angle
- Chainstays
- −25 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Specialized Sirrus numbers we have for size M are missing the reach and stack. The numbers below still compare.
Geometry side by side
| Measurement | Specialized Sirrus M | Trek FX Sport Women's 52 | Difference |
|---|---|---|---|
| Head tube angle | 71.5° | 71.3° | −0.2° |
| Seat tube angle | 73.5° | not listed | |
| Effective top tube | 580mm | 530 | −50 mm |
| Chainstay length | 445mm | 420 | −25 mm |
| Wheelbase | 1073mm | 1003 | −70 mm |
| BB drop | 70mm | 80 | +10 mm |
| Standover | 786mm | 735 | −51 mm |
| Seat tube length | 485mm | 475 | −10 mm |
| Head tube length | 165mm | 145 | −20 mm |
| Reach | not listed | 371 | |
| Stack | not listed | 561 | |
| BB height | not listed | not listed |
Differences are the Trek FX Sport Women's minus the Specialized Sirrus. Full charts: 2015 Specialized Sirrus, 2017 Trek FX Sport Women's.
Where each sits in its class
Specialized SirrusTrek FX Sport Women's
AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted
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 SirrusSirrus | Trek FX Sport Women's4 Women's |
|---|---|---|
| Shifter | Shimano EZ | Shimano Tiagra |
| Derailleur | Shimano M191, Shimano Altus | Shimano Tiagra, Shimano Sora R350 |
| Chain | KMC X8 | KMC X10 |
| Crankset | Shimano Altus | Shimano R460 |
| Tire | Specialized Nimbus | Bontrager AW1 Hard-Case Lite |
| Saddle | Specialized Targa Sport | Bontrager H1 WSD |
| Frame | not listed | Trek WSD FX Alpha Gold |
| Fork | not listed | Bontrager Nebula |
| Cassette | not listed | Shimano Tiagra |
| Wheelset | not listed | Formula TK31 |
| Hub | not listed | Formula TK-31, Formula TK-32 |
| Handlebar | not listed | Bontrager Satellite Plus IsoZone |
| Headset | not listed | VP Slimstak |
| Seatpost | not listed | Bontrager SSR |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
