Specialized Sirrus Step-Through (2021–23; Sirrus 2.0 Step-Through) geometry
Loading 3D view…
auto
Size XS
Render
Align
Geometry
| Size | XS | S | M |
|---|---|---|---|
| Stack mm | 555 | 563 | 593 |
| Reach mm | 393 | 400 | 408 |
| Head tube angle ° | 70.0 | 70.0 | 71.0 |
| Seat tube angle ° | 73.5 | 73.5 | 73.5 |
| Head tube length mm | 139 | 147 | 175 |
| Seat tube mm | 395 | 450 | 500 |
| Chainstay mm | 440 | 440 | 440 |
| BB drop mm | 70 | 70 | 70 |
| Fork rake mm | 51 | 51 | 51 |
| Stack to reach | 1.41 | 1.41 | 1.45 |
| Effective top tube mmi | 557 | 567 | 584 |
| Wheelbase mmi | 1058 | 1068 | 1076 |
SizeXSkey specs
Stack-to-reach (size XS)1.41More aggressive (lower and longer) than 81% of flat-bar frames in the database at comparable sizes.
Closest geometry matches (size XS)
Matched by stack, reach and head tube angle.
More from Specialized
Nearest size to the Sirrus Step-Through XS.