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I think the ‘30mm’ ones measure ~27mm new on 13mm internal rims. They’ll stretch a bit probably, other Panaracers-made tyres are similar.
On 17mm internal rims they measure 30mm.
The 33mm tyres actually measure all of that, even on 13mm internal rims. They’re thin/soft and probably have more stretch I guess.
miro_o
ectoplasmosis
How wide do these 30mm and 33.3mm tyres come up for you?
I’ve just fitted a 30mm Mile Muncher to a Rigida DP18 (13mm internal) and it measures just 26mm fully inflated, same as a ‘25C’ Conti Grand Prix on the same rim...