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Originally Posted by brian5
I've just purchased the "BMW Winter Package" for my E70 X5. The tires are Dunlop GRANDTREK WT M3 ROF (RunOnFlat). They are labeled "M+S". Are you saying that these are not "winter tires"? I have checked tirerack.com and it has them in the "Light Truck/SUV Performance Winter" category so they seem to be the right tires. There are VERY few options out there for E70's using winter run-flat tires...
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I'am sorry for the confusion.
Every winter tire is a M + S tire. But not every M + S tire is a good winter tire. Because all weather-tires are also M + S labeled and they are not a good choice for severe winter conditions. All weather or all season-tires don't have a good profile for grip in snow and the rubbermix is too hard. In cold conditions you need a soft rubbermix, which stays soft in low temperatures. This is only guaranteed with winter tires.
So Dunlop Grandtrek WT, Pirelli Scorpion Ice + snow or Bridgestone Blizzak are all premium winter tires.
Greetings
Gary