Wheelbuilding / Wheel Building / Wheel build help

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WillBradley in reply to @gbj_tester

No, an old English bike with 27" wheels means ETRTO 630, i.e. about 8mm larger diameter than 700C

Thanks for the info!
Could 27" tires work oversized on the current ETRTO 622?

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jsabine in reply to @WillBradley

No - the 622 and 630 are the respective bead seat diameters, so if you get the bead of a 27in tyre seated on one side of a 700c rim, at the other side it'll be nearly a cm too far out.

(And yes, 29er rims/tyres are also ETRTO 622, so the same diameter rims as 700c and smaller than 27in ...)

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