Specialized Sirrus Step-Through (alloy) geometry
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Size M
Render
Align
Geometry
| Size | S | M | L |
|---|---|---|---|
| Stack mm | 536 | 561 | 590 |
| Reach mm | 373 | 383 | 393 |
| Head tube angle ° | 70.0 | 71.0 | 71.0 |
| Seat tube angle ° | 73.5 | 73.5 | 73.5 |
| Head tube length mm | 124 | 146 | 176 |
| Seat tube mm | 400 | 450 | 500 |
| Chainstay mm | 440 | 440 | 440 |
| BB drop mm | 70 | 70 | 70 |
| Fork rake mm | 51 | 51 | 51 |
| Stack to reach | 1.44 | 1.46 | 1.50 |
| Effective top tube mmi | 532 | 549 | 568 |
| Wheelbase mmi | 1031 | 1040 | 1060 |
SizeMkey specs
Stack-to-reach (size M)1.46More aggressive (lower and longer) than 55% of flat-bar frames in the database at comparable sizes.
Closest geometry matches (size M)
Matched by stack, reach and head tube angle.
More from Specialized
Nearest size to the Sirrus Step-Through M.