2021 Specialized Sirrus X 5.0 vs 2021 Specialized Sirrus 4.0
The M is the Specialized Sirrus 4.0 size closest to your M Specialized Sirrus X 5.0. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Specialized Sirrus 4.0
Compared with the Specialized Sirrus X 5.0 in M, the Specialized Sirrus 4.0 in M places the top of the head tube at about the same height and about as far forward, relative to the bottom bracket.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- ±0 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Sirrus X 5.0, MSpecialized Sirrus 4.0, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus X 5.0 M | Specialized Sirrus 4.0 M | Difference |
|---|---|---|---|
| Reach | 384mm | 384mm | ±0 mm |
| Stack | 631mm | 631mm | ±0 mm |
| Head tube angle | 71° | 71° | ±0.0° |
| Seat tube angle | 73.5° | 73.5° | ±0.0° |
| Chainstay length | 435mm | 435mm | ±0 mm |
| Wheelbase | 1060mm | 1060mm | ±0 mm |
| Standover | 788mm | 788mm | ±0 mm |
| Seat tube length | 453mm | 453mm | ±0 mm |
| Fork length | 390mm | 390mm | ±0 mm |
| Head tube length | 169mm | 169mm | ±0 mm |
Differences are the Specialized Sirrus 4.0 minus the Specialized Sirrus X 5.0. Full charts: 2021 Specialized Sirrus X 5.0, 2021 Specialized Sirrus 4.0.
Where each sits in its class
Specialized Sirrus X 5.0Specialized 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 5.05.0 | Specialized Sirrus 4.04.0 |
|---|---|---|
| Shifter | Shimano SLX M7100 | not listed |
| Derailleur | Shimano SLX M7100 | microSHIFT R9, Shimano Sora |
| Cassette | SunRace CSMZ800 | Shimano Sora |
| Chain | KMC X-12 | KMC X9 |
| Crankset | Praxis Alba | not listed |
| Tire | Specialized Pathfinder Pro | Specialized RoadSport Reflect |
| Brake | Shimano MT200 | Tektro HD-R280 |
| Stem | Specialized Future | not listed |
| Saddle | Specialized Power Sport | Specialized Power Sport |
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