It was safety inspection time recently on the Viano and I got an advisory for rear tyre wear. They are now less than 3mm apparently. I've ordered a pair of the same, Goodyear Eagle NCT5's as the current ones have done just shy of 58000 miles. I could probably get another 3 or 4 thousand from them but safety comes first. I've been told, and I dont know if it's true, that new cars have tyres with an extra 1mm of tread on them so that people think they have good mileage from them and buy the same again at replacement time. Can anyone confirm or deny this as I didn't even think about measuring tread depth until 12000 miles. But I am due a service soon so I may just take a depth guage into the dealer with me. If it is true, what kind of miles should I expect from new NCT5's If it's not true then I obviously expect another 58000 miles.