7. According to the passage, what is the minimum recommended level of tyre tread depth?
The following guide is designed to help with various common causes of car wheel and tyre failures that occur, how to spot them and how to avoid them: • Make sure that your tyres’ tread depth is at least 3mm across ¾ of the tyre and around the entire circumference. o If your tyre wear is uneven, take your car to a tyre centre. They may be misaligned and need to be checked. • When you are driving with abnormally distributed excess weight, such as multiple passengers or heavy loads, adjust your tyre pressure accordingly. • Always make sure you have a tyre inflator and sealant kit available in the car for emergencies. o If you do not have these materials, make sure instead that you have a carjack on hand. • Always keep a spare wheel at home. Make sure it is correctly inflated and has good tread depth. The key is to be diligent and prepared for any outcome. If you follow these simple steps, you should be able to circumvent any tyre or wheel trouble that you may find yourself in.