Surly Preamble Flat Bar (M–XL) geometry
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Size Medium
Render
Align
Geometry
| Size | Medium | Large | X-Large |
|---|---|---|---|
| Stack mm | 567 | 605 | 643 |
| Reach mm | 391 | 404 | 421 |
| Head tube angle ° | 72.0 | 72.0 | 72.0 |
| Seat tube angle ° | 72.5 | 72.0 | 72.0 |
| Head tube length mm | 130 | 170 | 210 |
| Seat tube mm | 565 | 605 | 645 |
| Chainstay mm | 435 | 435 | 435 |
| BB drop mm | 66 | 66 | 66 |
| Fork rake mm | 44 | 44 | 44 |
| Stack to reach | 1.45 | 1.50 | 1.53 |
| Effective top tube mmi | 570 | 601 | 630 |
| Wheelbase mmi | 1030 | 1055 | 1085 |
SizeMediumkey specs
Stack-to-reach (size Medium)1.45More aggressive (lower and longer) than 67% of flat-bar frames in the database at comparable sizes.
Closest geometry matches (size Medium)
Matched by stack, reach and head tube angle.
More from Surly
Nearest size to the Preamble Flat Bar Medium.