Put a new set of tires on my 2016 Chrysler 300 yesterday. I asked the installer what pressure he pumped them up to, & he said 38 pounds. Looking on the tires, they say max PSI is 51 pounds. The sticker on the door says to inflate TP to 30 pounds. On the drive home yesterday, tires felt really pumped-up & hard. Today, I checked the TP on all 4 & 3 of them were 34 pounds, the LR was 39 pounds. I always thought the most common TP on a passenger car was 32 pounds. Anyway, I set all 4 tires this morning at 34 & it still feels too hard. Do I go with Chrysler's recommended pressure of 30 PSI?