In the long run. Should be changed to new tires

In general, you can run up to 50,000 km, the distance depends on road surface, tire pressure and vehicle maintenance. And Tyre. The inspection of the tread. The Computer Integrated Traditional indicator of tire wear. If breaking down the rubber to the tire change it. Some brands of car tires is that the condition of the tread on that. It's time to change or even by breaking down the grooves of the tread. When the tire tread wears down to a depth of 1.6 mm or less, if the wear is higher than the second line to change. If the tread is very shallow, but vulnerable to slipping out