Run flat tires have been a disaster. The first had to be replaced at 14k miles -- told was because they were out of line (all service done by the dealer from whom we bought the van). Next replacement at 30k miles, and now again again at 52k miles. Thus, 3 replacements of all 4 tire at intervals of 14 months or about every 17k miles on average. Costs 12,000 for each tire change. We were told warranty was for one year by the dealer, but looks like it is actually 3 years.
3 recalls on this van, would not buy another because of the tire issue.
Why are you replacing your tire every year??? Do you live on the country side where they've lot of gravel roads? Even in those conditions, you probably be changing it every 2 years.
If you're driving on a solid road, I would say 3-5 based on your driving habit.
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