The replacement cycle of car tyres should be determined by comprehensively considering factors such as service life, mileage, driving habits, and environmental conditions. Generally, It is best to replace them every 3 to 5 years or after 60,000 to 80,000 kilometres of driving, whichever comes first. Even if the mileage threshold hasn't been reached, immediate replacement is necessary when sidewall cracks, bulges appear, or tread depth falls below 1.6 mm (verifiable with a coin test) to ensure safety. It is advisable to shorten the inspection interval to every six months, with urban commuting replacement mileage typically ranging from 42,000 to 56,000 kilometres. For front-wheel-drive vehicles, front-to-rear rotation every 8,000 to 10,000 kilometres is recommended, while for new energy vehicles with higher front axle loads, this interval can be reduced to 6,000 to 8,000 kilometres. Additionally, maintaining cold tyre pressure at 2.3 to 2.5 bar (add 0.2 bar for new energy vehicles) and avoiding aggressive manoeuvres like rapid acceleration and hard braking can extend tyre lifespan by 15% to 20%. Tyres exceeding 6 years from their production date (identifiable via the DOT code on the sidewall) should be replaced regardless of apparent condition.
