I’ve observed that my Michelin Agilis Camper tyres have been mounted at the factory with the age (DOT) markings on the inner side. A tyre fitter told me today that they should really be on the outer side, but as the tyres are not directional and there’s no obvious inner/outer indicator on the sidewalls then the current orientation is not to the detriment of the tyres. I assume that having the age markings on the outside is a convention that makes it easier to determine the age of the tyre, but wonder if anyone has thoughts to the contrary.