aka Tom Reingold
Join Date: Jan 2009
Location: New York, NY, and High Falls, NY, USA
Posts: 40,502
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Mentioned: 511 Post(s)
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A international convention declared that bike tires should have the actual size written as well as the vernacular. Thus you will see 622x35 at the very least. You will usually also see something like 700Cx35 or 700x35C, but this is not a measurement. The actual measurement is 622x35. Further complicating things is that 35 is not that the inflated width will be. For one thing, rim width affects inflated tire width. In theory, that spec is provided by the maker by measuring the bead-to-bead distance as the tire is flattened out and then dividing by 2.5.