Surly Preamble Flat Bar (XS–S) geometry
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Size Small
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Geometry
| Size | X-Small | Small |
|---|---|---|
| Stack mm | 517 | 535 |
| Reach mm | 352 | 381 |
| Head tube angle ° | 70.0 | 71.0 |
| Seat tube angle ° | 74.0 | 73.0 |
| Head tube length mm | 120 | 135 |
| Seat tube mm | 410 | 505 |
| Chainstay mm | 420 | 420 |
| BB drop mm | 54 | 54 |
| Fork rake mm | 47 | 47 |
| Stack to reach | 1.47 | 1.40 |
| Effective top tube mmi | 500 | 545 |
| Wheelbase mmi | 987 | 1013 |
SizeSmallkey specs
Stack-to-reach (size Small)1.40More aggressive (lower and longer) than 80% of flat-bar frames in the database at comparable sizes.
Closest geometry matches (size Small)
Matched by stack, reach and head tube angle.
Apollo Mark I / II / III / IVsteel classic, 2016–18, 2016–18S · 535 / 382Apollo Trace 10 / 20 / 30 WSwomen's, 2016–17, 2016–17XS · 535 / 382Orbea Carpe2021XS · 535 / 378Orbea Vector2019–20 generation, 2019–20XS · 535 / 378Giant Escape R3Japan, 2023, 2023XS · 539 / 381Opus Fortitude FBflat bar, CurrentXS · 539 / 380
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