Senior Member
Join Date: Apr 2006
Location: Washington County, Vermont, USA
Posts: 3,781
Bikes: 1966 Dawes Double Blue, 1976 Raleigh Gran Sport, 1975 Raleigh Sprite 27, 1980 Univega Viva Sport, 1971 Gitane Tour de France, 1984 Lotus Classique, 1976 Motobecane Grand Record
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Here's a photo for skeptics who don't believe in 26.7 posts. I replaced the original with a 26.8 Kalloy post after enlarging the seat tube (of the 1981 Miyata 610) a bit with a brake-cylinder hone. Achieving a perfect fit was a ten-minute job with some cuttting oil. I had already stripped the frame, but I imagine that you could readily do it with the bottom bracket in place if you turned the bike upside down in a work stand to keep the gritty cutting oil from running down into the bottom bracket bearings and contaminating them.