Purchased 2 Continental tires Countryside Il, 12/10 pending a trip. During trip, 100 mpg less mileage (I have a Hybrid)& have used this car on same trip before. Developed a loud roaring noise over the course of the drive. Because the tires were new, I took the car to the dealer, paid for a diagnostic check to find there was nothing mechanically wrong. Had alignment check at another business, was told noise must be was from shock absorbers. Purchased new shocks. Noise and mileage still an issue, investigated on my own, & found tires were installed with the words "inside" on the outside of the tire, tires were installed backwards. Went to where tires were purchased, and was told the installer "should have noticed that.."sorry". They will replace tires only because I purchased road hazard warranty. Have severe abnormal wear on my 2 other tires- they require re-placement now. Manager argued it was not his problem, he couldn't verify the wear on my tires before new tires were purchased. Only 2 tires were purchased based on the recommendation of your service advisor, as they were "like new". Had I been in an accident on this trip, an investigation would have determined the tires were mounted improperly, & could be considered a contributing factor to an accident. Continental Tires responded to my email & said their tires need to be mounted correctly, or it will adversely affect their performance. What will you do to make this situation right? I need an additional 2 new tires now because of your error.