I noticed my outside passenger dually was losing air and it was significant-30 lbs. I pumped it up to 100 and in 2 weeks sitting it again is down 35 lbs.- time to do something. I decided to check my other tires and found they are all 6 years old. I went to the tire shop in the area I used to deal with years ago to get 4- 295/75 22.5 tires. He said they had Aurora...