Good thinking if you have either a 31.8 seat tube or a steel post stuck in a 28.6. I have a 27.0 O-Beam stuck in a 28.6 tube and the walls of the O-Beam are 3mm thick, leaving an aperture of 21mm which is 1mm too small for a '1 inch' quill. Hmmmm
I knew there must have been some reason why I didn't think of this one myself!
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