I've been driving BMWs since 1987 - currently have an F25 X3 with standard 17" tires (purposely went with 17" for winter road hazards in New England. Have a puncture - ran over a nail. On 3/15, I called the dealer for replacement (have tire/wheel insurance) and was told the Bridgestone tires are on back order and hopefully a tire would come in "sometime in April". I'm fine with RF tire but not being able to drive my vehicle for weeks due to a flat is unacceptable and just silly. Not a fan of mismatch tires. Am hoping for a temp tire or loaner car while I wait. All this in a major metro area - the poor folks who live far from dealers. Just an FYI to everyone.