1 inch is one of the most common seat post sizes for steel frames
Not for lightweight frames. The "most common" would be either 27.2 (Reynolds 531 etc.) or 26.8 (lots of Japanese tubesets with double butted seat tubes)
@gbj_tester started
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Not for lightweight frames. The "most common" would be either 27.2 (Reynolds 531 etc.) or 26.8 (lots of Japanese tubesets with double butted seat tubes)