^ agree .. 531 is normally 27.2
Normally but there are exceptions. Some Peugeot 531 frames had the seat post inserted upside down and so took something like 26.4mm seatpost and Pistoffski is selling a Gazelle 531 db track frame which takes a 26.8mm seatpost.
@marxist_vulcan started
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Normally but there are exceptions. Some Peugeot 531 frames had the seat post inserted upside down and so took something like 26.4mm seatpost and Pistoffski is selling a Gazelle 531 db track frame which takes a 26.8mm seatpost.