2023 Specialized Sirrus 6.0 vs 2025 Specialized Sirrus X 4.0
The Specialized Sirrus X 4.0 size closest to your M is the M. Compare the M instead
What changes on the Specialized Sirrus X 4.0
Compared with the Specialized Sirrus 6.0 in M, the Specialized Sirrus X 4.0 in S places the top of the head tube 19 mm lower and 4 mm further back, relative to the bottom bracket. Its wheelbase is 5 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −19 mm
- Lower front end
- Frame reach
- −4 mm
- Shorter frame reach
- Wheelbase
- −5 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Sirrus 6.0, MSpecialized Sirrus X 4.0, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Sirrus 6.0 M | Specialized Sirrus X 4.0 S | Difference |
|---|---|---|---|
| Reach | 380mm | 376 | −4 mm |
| Stack | 625mm | 606 | −19 mm |
| Head tube angle | 70° | 70 | ±0.0° |
| Seat tube angle | 73.5° | 73.5 | ±0.0° |
| Chainstay length | 440mm | 440 | ±0 mm |
| Wheelbase | 1065mm | 1060 | −5 mm |
| Seat tube length | 330mm | 440 | +110 mm |
| Fork length | 395mm | 395mm | ±0 mm |
| Head tube length | 151mm | 143 | −8 mm |
| Effective top tube | not listed | 559 | |
| BB drop | not listed | 70 | |
| BB height | not listed | 284 | |
| Standover | not listed | 750 |
Differences are the Specialized Sirrus X 4.0 minus the Specialized Sirrus 6.0. Full charts: 2023 Specialized Sirrus 6.0, 2025 Specialized Sirrus X 4.0.
Where each sits in its class
Specialized Sirrus 6.0Specialized 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 6.06.0 | Specialized Sirrus X 4.04.0 |
|---|---|---|
| Shifter | SRAM GX | Shimano CUES U6000 |
| Derailleur | SRAM GX Eagle | Shimano CUES U6000 Shadow |
| Cassette | SRAM NX Eagle | Shimano CS-LG400-11 |
| Chain | SRAM GX Eagle | KMC eGlide |
| Crankset | SRAM Rival DUB | Prowheel Alloy |
| Bottom bracket | SRAM DUB | not listed |
| Tire | Specialized Roubaix Pro 2BR | Specialized Pathfinder Sport |
| Rim | DT Swiss R470 | not listed |
| Brake | SRAM TLM | Tektro HD-R510 |
| Stem | Specialized Future | Specialized Future |
| Seatpost | Roval Terra | not listed |
| Saddle | Specialized Power Sport | 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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