17-05-2019, 06:42 PM
Current tyre industry would recommend changing at 3mmm. Wet grip diminishes rapidly below this. However ageing is a little more difficult, and I’m surprised you got an advisory for a 7 year old tyre. The real danger to Seven with old tyres is not the rubber hardening - this will affect grip levels and braking performance but whether it would be noticeable to most seven drivers is questionable. What you should be concerned about is what you can’t see - what’s inside. If the carcass is rotted you could be in real trouble. If there are any sidewall cracks or distortion I’d change tyres regardless of age.
Alan Fairless