2020 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 L places the top of the head tube 18 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 3 mm longer, which can contribute to stability at speed.
- Frame stack
- +18 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +3 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Sirrus X 5.0, MSpecialized Sirrus 4.0, LDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus X 5.0 M | Specialized Sirrus 4.0 L | Difference |
|---|---|---|---|
| Reach | 384mm | 386mm | +2 mm |
| Stack | 631mm | 649mm | +18 mm |
| Head tube angle | 71° | 71.5° | +0.5° |
| Seat tube angle | 73.5° | 73.5° | ±0.0° |
| Chainstay length | 435mm | 435mm | ±0 mm |
| Wheelbase | 1060mm | 1063mm | +3 mm |
| Standover | 788mm | 813mm | +25 mm |
| Seat tube length | 453mm | 483mm | +30 mm |
| Fork length | 390mm | 390mm | ±0 mm |
| Head tube length | 169mm | 186mm | +17 mm |
Differences are the Specialized Sirrus 4.0 minus the Specialized Sirrus X 5.0. Full charts: 2020 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 5.0 | Specialized Sirrus 4.04.0 |
|---|---|---|
| Derailleur | not listed | microSHIFT R9, Shimano Sora |
| Cassette | not listed | Shimano Sora |
| Chain | not listed | KMC X9 |
| Tire | not listed | Specialized RoadSport Reflect |
| Brake | not listed | Tektro HD-R280 |
| Saddle | not listed | Specialized Power Sport |
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