2021 Specialized Sirrus X 4.0 vs 2023 Specialized Sirrus 4.0
The Specialized Sirrus 4.0 size closest to your S is the S. Compare the S instead
What changes on the Specialized Sirrus 4.0
Compared with the Specialized Sirrus X 4.0 in S, the Specialized Sirrus 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 X 4.0, SSpecialized Sirrus 4.0, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus X 4.0 S | Specialized Sirrus 4.0 M | Difference |
|---|---|---|---|
| Reach | 376mm | 382mm | +6 mm |
| Stack | 606mm | 635mm | +29 mm |
| Head tube angle | 70° | 71° | +1.0° |
| Seat tube angle | 73.5° | 73.5° | ±0.0° |
| Chainstay length | 440mm | 440mm | ±0 mm |
| Wheelbase | 1060mm | 1065mm | +5 mm |
| Standover | 750mm | 778mm | +28 mm |
| Seat tube length | 440mm | 470mm | +30 mm |
| Fork length | 395mm | 395mm | ±0 mm |
| Head tube length | 143mm | 169mm | +26 mm |
Differences are the Specialized Sirrus 4.0 minus the Specialized Sirrus X 4.0. Full charts: 2021 Specialized Sirrus X 4.0, 2023 Specialized Sirrus 4.0.
Where each sits in its class
Specialized Sirrus X 4.0Specialized Sirrus 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 X 4.04.0 | Specialized Sirrus 4.04.0 |
|---|---|---|
| Shifter | Shimano Deore M5100 | Shimano Tiagra |
| Derailleur | Shimano Deore M5100 | Shimano Tiagra FD-4700, Shimano Tiagra |
| Cassette | Shimano Deore M5100 | Shimano CS-HG500 |
| Chain | KMC X11 | KMC X10 |
| Tire | Specialized Pathfinder Sport | Specialized RoadSport Reflect |
| Brake | Shimano MT200 | Shimano MT200 |
| Stem | Specialized Future | Specialized Future |
| Saddle | Specialized Bridge | Specialized Bridge |
| Crankset | not listed | Praxis Alba M24 |
| Bottom bracket | not listed | Praxis M24 |
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