The simplest method to check the wear and tear of your tyres is to look for the "tread wear indicators." These are raised bars located in the grooves between the tread blocks that indicate when the tyre has worn to the minimum legal depth of 1.6mm. You can find them by visually inspecting your tyre's tread. If the tread is worn near or below the level of these indicators, it is high time to get them replaced. Another way to check your tyre's health is to carry out the "coin test." Place a 20p coin into one of the deep-treaded grooves on your tyre, with the head pointing down. If the tread covers the outer border of the coin, your tyres are still okay. But if the outer rim of the coin is visible, it means the tyre tread is less than 3mm and heading towards the legal limit or even worse, worn out and needs to be replaced.