2021 Specialized Sirrus X 5.0 vs 2021 Specialized Sirrus 4.0
The Specialized Sirrus 4.0 size closest to your M is the M. Compare the M instead
What changes on the Specialized Sirrus 4.0
Compared with the Specialized Sirrus X 5.0 in M, the Specialized Sirrus 4.0 in XL places the top of the head tube 56 mm higher and 14 mm further forward, relative to the bottom bracket. Its wheelbase is 22 mm longer, which can contribute to stability at speed.
- Frame stack
- +56 mm
- Higher front end
- Frame reach
- +14 mm
- Longer frame reach
- Wheelbase
- +22 mm
- Longer: steadier at speed
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Sirrus X 5.0, MSpecialized Sirrus 4.0, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus X 5.0 M | Specialized Sirrus 4.0 XL | Difference |
|---|---|---|---|
| Reach | 384mm | 398mm | +14 mm |
| Stack | 631mm | 687mm | +56 mm |
| Head tube angle | 71° | 72° | +1.0° |
| Seat tube angle | 73.5° | 73.5° | ±0.0° |
| Chainstay length | 435mm | 435mm | ±0 mm |
| Wheelbase | 1060mm | 1082mm | +22 mm |
| Standover | 788mm | 849mm | +61 mm |
| Seat tube length | 453mm | 533mm | +80 mm |
| Fork length | 390mm | 390mm | ±0 mm |
| Head tube length | 169mm | 223mm | +54 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 |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
