I remember buying an Audi which came with Vredestein M&S tyres , with studs ; it was a parts car , but I put the wheels on my car during a period of snow , alas I wasn't quick enough removing them after the snow cleared and it was amazing how quickly I lost all the studs . I just used them as a set of normal tyrea after that .To be fair, nothing drives well on ice, except studded tyres!