2023 Specialized Sirrus 4.0 vs 2025 Specialized Sirrus X 4.0
The Specialized Sirrus X 4.0 size closest to your S is the S. Compare the S instead
What changes on the Specialized Sirrus X 4.0
Compared with the Specialized Sirrus 4.0 in S, the Specialized Sirrus X 4.0 in XXS places the top of the head tube 19 mm lower and 21 mm further back, relative to the bottom bracket. Its wheelbase is 27 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −19 mm
- Lower front end
- Frame reach
- −21 mm
- Shorter frame reach
- Wheelbase
- −27 mm
- Shorter: quicker to change direction
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Sirrus 4.0, SSpecialized Sirrus X 4.0, XXSDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus 4.0 S | Specialized Sirrus X 4.0 XXS | Difference |
|---|---|---|---|
| Reach | 376mm | 355 | −21 mm |
| Stack | 606mm | 587 | −19 mm |
| Head tube angle | 70° | 69.5 | −0.5° |
| Seat tube angle | 73.5° | 73.5 | ±0.0° |
| Chainstay length | 440mm | 440 | ±0 mm |
| Wheelbase | 1060mm | 1033 | −27 mm |
| Standover | 750mm | 700 | −50 mm |
| Seat tube length | 440mm | 360 | −80 mm |
| Fork length | 395mm | 395mm | ±0 mm |
| Head tube length | 143mm | 111 | −32 mm |
| Effective top tube | not listed | 529 | |
| BB drop | not listed | 70 | |
| BB height | not listed | 284 |
Differences are the Specialized Sirrus X 4.0 minus the Specialized Sirrus 4.0. Full charts: 2023 Specialized Sirrus 4.0, 2025 Specialized Sirrus X 4.0.
Where each sits in its class
Specialized Sirrus 4.0Specialized Sirrus X 4.0
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 4.04.0 | Specialized Sirrus X 4.04.0 |
|---|---|---|
| Shifter | Shimano Tiagra | Shimano CUES U6000 |
| Derailleur | Shimano Tiagra FD-4700, Shimano Tiagra | Shimano CUES U6000 Shadow |
| Cassette | Shimano CS-HG500 | Shimano CS-LG400-11 |
| Chain | KMC X10 | KMC eGlide |
| Crankset | Praxis Alba M24 | Prowheel Alloy |
| Bottom bracket | Praxis M24 | not listed |
| Tire | Specialized RoadSport Reflect | Specialized Pathfinder Sport |
| Brake | Shimano MT200 | Tektro HD-R510 |
| Stem | Specialized Future | Specialized Future |
| Saddle | Specialized Bridge | Specialized Power Sport |
| Frame | not listed | Specialized A1 SL |
| Fork | not listed | Specialized FACT 9r |
| Chainring | not listed | 42T |
| Pedals | not listed | Specialized Body Geometry Fitness |
| Grips | not listed | Specialized Neutralizer |
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