[RoundelM3]

^Really...so the ability to hold up approximately 1,000 lbs. loading per corner takes only 1 lb. of additional material on the front and 2 lb. on the rear? Nonetheless, I don't care for the stiff sidewalls and the expense of the replacement cost. As far as patching being the same for runflats and non-runflats, of course you don't patch a sidewall puncture or tear - that's a given. I've had non-runflats plugged because of a nail in the tread and went on to drive thousands more miles, never any problems. And like another poster in the thread, I've had 1 flat in the past 15 years, and none that I can remember prior to that. All the cars were Porsches or BMWs with Z-rated tires. I agree that it should be an option, as the 5th tire and jack are about equal to the additional cost of the runflats. My biggest other issue with the Bridgestones are the poor treadwear number for the rears - 140. I was lucky to get 13K miles on them.