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 M places the top of the head tube 29 mm higher and 6 mm further forward, relative to the bottom bracket. Its wheelbase is 5 mm longer, which can contribute to stability at speed.
- Frame stack
- +29 mm
- Higher front end
- Frame reach
- +6 mm
- Longer frame reach
- Wheelbase
- +5 mm
- Longer: steadier at speed
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Sirrus 4.0, SSpecialized Sirrus X 4.0, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus 4.0 S | Specialized Sirrus X 4.0 M | Difference |
|---|---|---|---|
| Reach | 376mm | 382 | +6 mm |
| Stack | 606mm | 635 | +29 mm |
| Head tube angle | 70° | 71 | +1.0° |
| Seat tube angle | 73.5° | 73.5 | ±0.0° |
| Chainstay length | 440mm | 440 | ±0 mm |
| Wheelbase | 1060mm | 1065 | +5 mm |
| Standover | 750mm | 778 | +28 mm |
| Seat tube length | 440mm | 470 | +30 mm |
| Fork length | 395mm | 395mm | ±0 mm |
| Head tube length | 143mm | 169 | +26 mm |
| Effective top tube | not listed | 573 | |
| 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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