Thread: Seat Post Collar Size.
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Old 01-16-17, 02:07 PM
  #3  
fietsbob
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You are going to have to buy measuring tools.

ID + 2 x the tube wall thickness is the OD of the tube..


generally tubing uses inch sizes, but are spoken of in metric ..numbers..





Last edited by fietsbob; 01-16-17 at 09:16 PM.
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