The best way to know when to replace your tyres is to have them inspected by a professional. However, you can evaluate your tyres yourself through visual inspection:

• Inspect the tread depth and check for cracked treads.
• Inspect the tread pattern.
• Inspect the sidewall for over and underinflation.
• Ensure that these processes are repeated for all four tyres.
• Always carry out routine tyre inspection & replacement.