Old 06-24-12, 06:33 AM
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tsappenfield, Quirky math? Yeah, sort of. A rim for 700C is 622 mm ISO bead seat diameter. A rim for 27" has a 630 mm ISO bead seat diameter. 700C rims are also known as 29" and 18" rims in some circles, but as far as I'm aware the 27" rims and tires are known only as 27".

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