Reynolds 531 db etc. Outside diameter 28.6mm Less wall thickness 5.5mm x 2 1.1mm Resultant setpost 'hole' 27.5mm
In reality the brazing process can cause a slight ovalization of tubing making 27.2mm a more common seatpost size, however reaming out to 27.4mm on a wellbuilt ie not overheated frame is often possible.
Peter Tutty Still raining in Londonderry, NSW, Australia.
Gary Watts <watts.gary@gmail.com> wrote: I saw a 27.4 NOS Campy seatpost go by on ebay this last week and just finished cleaning one up for a friend. I didn't know there was such an animal. What bike/frame tubing used/uses 27.4?
Gary Watts Vancouver, Washington USA
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