Brian Booth wrote:
> In answer to Ted's question, the 27 inch tubulars that Brian
> Frank has for sale are 630mm in diameter, 700C and 28 x 1 1/4
> are 622mm.
This seems to be a common misconception. Singles (or tubulars, or sew-ups) are often called 27 inch, even though the rim is actually the same diameter as a 700C HP (or clincher, or wire-on) tyre.
There is no 700c/27" difference with singles, they just are.
> For a complete disertation on tire sizing look at Sheldon
> Brown's page at
> http://sheldonbrown.com/
Sheldon Brown's tyre sizing page gives a great run-down on the various HP (clincher, wire-on) sizes, but no information at all on singles.
Regards,
Suzy