Wheelbuilding / Wheel Building / Wheel build help

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hippy in reply to @svenhöek

Wow, they're massive. What's the minimum tyre width you can run on those? I normally race on 25/28 but I'd go higher if I could find something fast and reliable in say a 32mm.

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gbj_tester in reply to @hippy

What's the minimum tyre width you can run on those?

You probably want a true width of at least 28mm. In practice, that means any "25" which is 25mm on a 15mm rim will be fine, as it will come up to more like 30mm on that rim.

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svenhöek in reply to @gbj_tester

usually tire size on wide rims is: size on a 15mm rim + half the difference between rims:

a measured 23mm tire@15c on a 23mm wide rim becomes ((23-15)/2=+4mm) = 27mm...

edit: tldr: tire size changes with half the rim width difference

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