Thread: SeatPOST sizes?
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Old 09-01-18, 09:13 AM
  #9  
dedhed
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They start at 7/8"(22.2mm) and go up into the low 30's.
Then there is the whole proprietary aero designs. Even measuring your existing doesn't guarantee that someone didn't stuff the wrong size one in unless you know for sure it's original.
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