When you buy tyres they actually come with a dB rating, at least in the EU. See: https://www.protyre.co.uk/car-help-advice/tyre-selection/what-is-a-good-noise-

When you buy tyres they actually come with a dB rating, at least in the EU. See: https://www.protyre.co.uk/car-help-advice/tyre-selection/what-is-a-good-noise-rating-for-tyres-tyre-noise-ratings-chart-explained https://www.protyre.co.uk/car-help-advice/tyre-selection/wha...