BMC 257 AL ST (step-through) geometry
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Size S
Render
Align
Geometry
| Size | S | M |
|---|---|---|
| Stack mm | 590 | 640 |
| Reach mm | 390 | 420 |
| Head tube angle ° | 70.0 | 70.0 |
| Seat tube angle ° | 74.0 | 74.0 |
| Head tube length mm | 165 | 219 |
| Seat tube mm | 450 | 500 |
| Chainstay mm | 440 | 440 |
| BB drop mm | 67 | 67 |
| Fork rake mm | 45 | 45 |
| Stack to reach | 1.51 | 1.52 |
| Effective top tube mmi | 559 | 604 |
| Wheelbase mmi | 1063 | 1111 |
SizeSkey specs
Stack-to-reach (size S)1.51More relaxed (taller and shorter) than 60% of flat-bar frames in the database at comparable sizes.
Closest geometry matches (size S)
Matched by stack, reach and head tube angle.