Specialized Sirrus X (carbon, FACT 9r) geometry
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Size M
Render
Align
Geometry
| Size | M | L | XL | XXL |
|---|---|---|---|---|
| Stack mm | 631 | 649 | 687 | 709 |
| Reach mm | 384 | 386 | 398 | 410 |
| Head tube angle ° | 71.0 | 71.5 | 72.0 | 72.0 |
| Seat tube angle ° | 73.5 | 73.5 | 73.5 | 73.0 |
| Head tube length mm | 169 | 186 | 223 | 246 |
| Seat tube mm | 452.8 | 483 | 533 | 563 |
| Chainstay mm | 435 | 435 | 435 | 435 |
| BB drop mm | 70 | 70 | 70 | 70 |
| Fork rake mm | 51 | 51 | 51 | 51 |
| Stack to reach | 1.64 | 1.68 | 1.73 | 1.73 |
| Effective top tube mmi | 571 | 578 | 601 | 627 |
| Wheelbase mmi | 1060 | 1063 | 1081 | 1101 |
SizeMkey specs
Stack-to-reach (size M)1.64More relaxed (taller and shorter) than 92% of flat-bar frames in the database at comparable sizes.
Closest geometry matches (size M)
Matched by stack, reach and head tube angle.
Specialized Sirrus Carbonmen's spec; Elite / Expert / Pro, 2019–20M · 631 / 384Author Avioncarbon, 29", 2023–2418" · 633 / 386Specialized Sirrus 4.0carbon, 2021 onM · 635 / 382Specialized Sirrus X 4.0carbon, 2020 onM · 635 / 382KHS Westwoodcomfort hybrid, 2025L/19 · 630 / 386Centurion Crossline Pro Tourtrapeze, 2019–20XS · 631 / 387
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