2026 Specialized Sirrus X 1.0 vs 2027 Trek FX Sport SL
The Trek FX Sport SL size closest to your S is the S. Compare the S instead
What changes on the Trek FX Sport SL
Compared with the Specialized Sirrus X 1.0 in S, the Trek FX Sport SL in XS places the top of the head tube 20 mm lower and 10 mm further back, relative to the bottom bracket. Its wheelbase is 14 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −20 mm
- Lower front end
- Frame reach
- −10 mm
- Shorter frame reach
- Wheelbase
- −14 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 1.0 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 1.0 S | Trek FX Sport SL XS | Difference |
|---|---|---|---|
| Reach | 393mm | 383 | −10 mm |
| Stack | 563mm | 543 | −20 mm |
| Head tube angle | 70° | 70.0° | ±0.0° |
| Seat tube angle | 73.5° | not listed | |
| Effective top tube | 560mm | 528 | −32 mm |
| Chainstay length | 440mm | 442 | +2 mm |
| Wheelbase | 1061mm | 1047 | −14 mm |
| BB drop | 70mm | 65 | −5 mm |
| BB height | 288mm | 285 | −3 mm |
| Standover | 755mm | 708 | −47 mm |
| Seat tube length | 440mm | 356 | −84 mm |
| Fork length | 395mm | not listed | |
| Head tube length | 147mm | 115 | −32 mm |
Differences are the Trek FX Sport SL minus the Specialized Sirrus X 1.0. Full charts: 2026 Specialized Sirrus X 1.0, 2027 Trek FX Sport SL.
Where each sits in its class
Specialized Sirrus X 1.0Trek 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 1.01.0 | Trek FX Sport SLSL 4 |
|---|---|---|
| Shifter | Shimano Altus SL-M315-7R | Shimano CUES U6000 |
| Derailleur | Shimano Acera | Shimano CUES U6000 GS |
| Cassette | microSHIFT CS-H074 | Shimano CUES LG300 |
| Chain | KMC X8 | KMC Glide |
| Crankset | Prowheel XXS | Prowheel Alloy |
| Tire | Specialized Pathfinder Wirebead Fast Gravel | Bontrager GR1 Expert |
| Brake | Specialized Lee Chi | Shimano MT201 |
| Grips | Specialized Neutralizer | Bontrager Satellite IsoZone Plus |
| Saddle | Specialized Bridge Sport | Trek Verse |
| Frame | not listed | Trek FX Sport |
| Fork | not listed | Carbon |
| Chainring | not listed | Prowheel narrow-wide |
| Pedals | not listed | Bontrager City |
| Wheelset | not listed | Bontrager Paradigm |
| Hub | not listed | Formula CL-51, Formula CL-52 |
| Rim | not listed | Bontrager Paradigm |
| Rotor | not listed | Shimano SM-RT10 |
| Handlebar | not listed | Bontrager Satellite Plus IsoZone |
| Stem | not listed | Bontrager Elite |
| Headset | not listed | Bontrager Expander Plug |
| Seatpost | not listed | Bontrager alloy |
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