I have a 2007 Prius with 45,000 mls. The tire size is 195 / 65 R 17 86 v rating. The first set that came on the car where Bridgestones and I had them rotated every 5,000 mls. The tire swore out at 20,000 mls. I bought a set Michelins and rotated them at 5,000 mls and they are down to 3/32 tread left. Has anyone else had this problem? Has anyone tried different tires and got better mileage than 20,000?