obermd· Premium Member
In the 50s all passenger car tires were bias-ply. Bias-ply tires bulge when you over inflate them which is why you get uneven wear from over inflation. Modern radial tires don't bulge. Different technology.Tom McCahill of Mechanics Illustrated was always recommending 50 psi for tire pressure back in the 50's. Does have some negative effects, like major wear in the center of the threads, hard on your back with any kind of bump, and really rough on your suspension, especially control arms and ball joints, and far poorer traction in the snow.
I always went with the sticker values, best all around, but tend to go 10% more with the Cruze because of this crazy TPMS. Tire pressure should be check when tires are cold, but in this kind of weather with a garage temperature of 30+*F, and outdoor temps like -30*F, at 30 psi can drop to like 26 psi.
And the more you fool around with these way overpriced tire valves, the quicker you will wear them out.
The correct tire pressure is no lower than the door placard and no higher than the max PSI embossed in the sidewall. Find a pressure that meets your personal desire for ride comfort (read - no road feel) and handling. There is a huge amount of safety margin in a tire, even at max sidewall PSI.
With radial tires the front tires will wear faster at the shoulders and the rear tires faster in the middle of the tread. This is the nature of vehicle suspensions. To counter this tendency you must rotate your tires. GM recommends every 7,500. I recommend every 5,000 based on personal experience. If you see any other type of uneven wear get an alignment. Also get an alignment immediately after purchasing new tires.