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Topics - CDG999

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British Bikes / How do you calculate beaded edge rim diameters?
« on: January 18, 2021, 05:14:12 AM »
Hello,

I need a quick lesson in how to measure beaded edge rim diameters. I'm more familiar with American bikes, so I understand the 26"x3" (= x20" Dia.) and 28"x3" (= 22" Dia.).

What I'm not sure about is the 26"x2½" and particularly the 26"x2½x2¼", which I understand is a larger diameter than a 26"x2½? And how is the rim diameter calculated?

Craig.

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