I had them on my van for only a year and a half, I had only done 6675 miles on them and one of them failed the MOT. The fault was a Track rod end that had caused excess where on one side of one tyre. On closer inspection both front tyres had cracking between the treads so I checked the four digit date mark that is in brackets and it showed that they had been on a shelf for over a year and a half before they were fitted to my van so they were twice as old as I thought they were. I am in the process of having two new tyres fitted an the two cracked ones sent back to Landsail for inspection and hopefully apart refund for unused tread. Thanks for reading this. Geff Lee.