Tire replacement depends on several factors, including the tyre’s tread depth, age, and overall condition. To check the tread depth, insert a coin into the tread grooves. If the tread covers part of the coin, it’s usually safe. However, if the tread is worn down to the tread wear indicators (typically 1.6 mm), it’s time for new tyres. Additionally, if your tyres are older than six years, or you notice cracks, bulges, or uneven wear, it’s best to replace them, even if the tread seems sufficient.