Read in a magazine, "how to heat cycle new tires" Once you get the new tires find a empty parking lot and do 6 skid pad style circles, just big round even circles. Make tires get hot to the touch, if not do more circles then do the same amount the opposite direction. Drive straight home and get the car off the ground or take the wheels off and store in a cool place for 24 to 48 hours. The article said to lay them flat so the whole tire gets the same amount of time to cool. This may sound weird but it is to tighten up the bonding of the rubber and makes the tires last longer once theyve been heated and cooled. kind of like heat treating metal. give it a shot i know i will once i get a new set.