Re: [CR]wheelbuilers question.......

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Date: Fri, 21 May 2004 17:23:03 -0400
To: Wayne Davidson <>, "CR BIKE LIST" <>
From: Sheldon Brown <>
Subject: Re: [CR]wheelbuilers question.......

At 10:32 PM +1200 5/21/04, Wayne Davidson wrote:
>Hi all, when measuring clincher rims, what are the outside diameters of a
>27" and a 700C?........regards wayne davidson Invers NZ........

That varies somewhat. The controlled dimension is the bead seat diameter, 630 mm for 27", 622 mm for 700C.

Typical rim walls are on the order of 5 mm so the overall would be roughly 640 mm for 27", 632 mm for 700C

Sheldon "By The Numbers" Brown Newtonville, Massachusetts +----------------------------------------------------------------+ | Anyone who cannot cope with mathematics is not fully human. | | At best he is a tolerable subhuman who has learned to wear | | shoes, bathe, and not make messes in the house. | | --Robert A. Heinlein | +----------------------------------------------------------------+ --
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