Senior Member
Join Date: Nov 2005
Posts: 5,768
Bikes: Cinelli, Paramount, Raleigh, Carlton, Zeus, Gemniani, Frejus, Legnano, Pinarello, Falcon
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I finally bought a tool that I had been dreaming of for years: a turned aluminum rod with all the sizes in steps over the length. Drop it in the frame, the one that fits is the size. I always found it hard to be accurate with calipers, so unless you have a bunch of seatposts around, its hard to judge sometimes.