More tread = more grip. Anything under 3mm can compromise performance and safety. Check your tread depth on all four tyres. Bridgestone recommend you check the inner, outer and centre. Use a dedicated tread gauge or the built-in tread wear indicator on your tyres (the legal limit of 1.6mm is reached when the tyre is worn to the level of the tread wear indicators in the main groove).
Maintaining correct inflation pressure is essential. Tyres naturally lose pressure over time so you need to refill them regularly. Check your tyre pressure at least once a month and when your tyres are cold, and before making long journeys.
Your tyres are built to withstand tough treatment, but theyre not indestructible. Poor wheel alignment, prolonged under or over-inflation and harsh road conditions can cause damage that will compromise the reliability of your tyres. Check regularly for uneven wear (on both sides of the tyre), tears, cracks or bulges on the sidewall and damage to the wheel rims.