You should change your tires based on several factors including tread depth, age, and damage:
- Tread Depth: Replace your tires when the tread depth reaches about 3 mm (4/32 inch), as below this point wet grip worsens and the risk of aquaplaning increases. Legally, tires with tread depth less than 1.6 mm (2/32 inch) need to be replaced.
- Age: Tires typically last 6 to 10 years. It is recommended to replace tires that are 10 years or older regardless of appearance due to rubber degradation and the risk of cracks. Tires 5 years or older should be inspected regularly by a professional.
- Damage and Wear: Replace tires immediately if there is visible damage such as punctures, cracks, bulges, or uneven wear patterns, as these can compromise safety.
- General Inspection: Regularly check tire pressure monthly and have inspections especially after 5 years to ensure tires remain roadworthy. If replacing fewer than four tires, replace at least the rear two with similar types to avoid handling issues.
In summary, check tread depth frequently, replace worn or damaged tires promptly, and retire tires older than 10 years for safety. Regular professional inspections are advisable from 5 years onward.
