Tyre performance is verified in practice tests such as test-rig tests and road tests. The test program includes criteria from fields such as driving dynamics, driving safety and environmental properties, and was developed on the basis of user-focused normal tyre use.
The certification mark can be applied for by tyre manufacturers, who are certified as suppliers of OEM tyres for the automotive industry according to VDA Standard 6.1 – which comprises requirements for suppliers and sub-contractors of the automotive industry – or according to an equivalent or higher international standard (e.g. ISO 16949). Proof of fulfilment of the above criteria must be provided on application.
All tyres are tested for their performance on a wet road surface. For this statement to be included on the certification mark, all tyres (except studded Nordic snow tyres) are tested against a standard reference test tyre. These results are then used to calculate the wet grip index (G) of the tested tyre. The test also determines the tyre’s aquaplaning performance (except Nordic snow tyres).
The tyre’s dynamic driving characteristics, such as steering performance, safety reserves and near-limit performance, are tested on a wet handling course. Alternatively, lateral guidance on a wet road is tested on a wet circle.
Snow tyres (3PMSF marking, “snowflake symbol”) are subject to additional tests, such as braking and traction tests on snow. In addition, dynamic driving characteristics are determined on a snow-covered handling course or circle. Nordic snow tyres have to pass limits on ice surface in Addition.