The linear distance between the outsides of the sidewalls of an inflated tyre including the elevation due to labelling (markings), decorations, or protective bands or ribs. Inflation pressure means the pressure taken with the tyre at ambient temperature and does not include any pressure to build-up to tyre usage.

Passenger car tyres and/or motorcycle tyres designated for loads and inflation pressure higher than the standard version. Tyre Size designation a tyre may be identified by a service description consisting of a load index (or two load indices in the case of single / dual fitments) and a speed symbol.