Sorry for hijacking the post. I'm trying to get rid of run flat tires for my x5.
use the calculator for tires and found few options for go flat all season. Tire size is 295/40/21 or 295/35/21 for all 4, available tires are Michelin pilot sport 4 and continental extremecontact dws06 plus and they are Y speed rating. I'm planning to go for this route.
Any input would be much appreciated.
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