I bought 4 new Pirelli tyres from my usual garage here in Fife, Scotland. They have ruined the ride of my otherwise fine car to the point I thought the suspension had a problem, other garage checked and says it is fine but the tyres are 4.5 years old when supplied.

The garage that supplied the tyres claim that the supplier has told them that they can sell tyres as new that are up to 7 years old as long as they havent been used.

Is this true and if not what can I do about it?

Im sure it affects many people without them ever knowing.