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Is there any way of knowing what width a tyre will be on a rim without buying it and trying it on?

Ideally Id like to get some 700x28s and I know that I used to be able to run these on my previous wheelset with my frame but the new wheels Ive got are wider (19mm internal)

 

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peted76 [1431 posts] 1 month ago
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There's probably a chart somewhere.. but 'not really' is the answer.. some 28mm tyres are larger than others..  I'd 'estimate' that you'd be looking at a 31mm width with 19mm inner width. 

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BehindTheBikesheds [3169 posts] 1 month ago
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depends on tyre, some tyres come up significantly, some less so. A 28mm Panaracer EVO L  comes up 31mm on an 18mm internal H+Son TB14 at approx 95psi.

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check12 [284 posts] 1 month ago
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on my 18mm internal rims, conti 4000s 23mm are 26mm and 25mm are 28mm.

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Xenophon2 [40 posts] 1 month ago
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No, there' s no way to be certain except if you find someone with the exact same combination and setup.  Purchase one, mount it and see if you've enough clearance left.  If it's a matter of 1-2 mm  remaining then I'd walk away if it were me.