Indoor testing of tyres Nokian Tyres’ indoor testing makes sure that its new rubber mixtures, tread patterns and tyre constructions are of high quality and are friendly to the environment. Moreover, with the indoor testing, we make sure that the tyres conform to norms and requirements worldwide. Materials testing machines are used to test the structural toughness and high-speed durability of tyres. Repetitive tests are used for monitoring the flawlessness of tyres and for making sure products are of high quality and technically reliable. Obtaining certifications from the authorities and E-certificates requires separate tests which prove that products fulfil the requirements placed on them.