I ran 32psi front and rear.
The ring? On the center cap, you mean? I have no idea. Is the cap loose? I really dont know.
And yeah, they make more noise than the Nitto 450s (225/50/16) I have on the stock wheels. These tires dont corner like the 555 17s though. I never did get those tires to slide around a corner.

Rod K.
98.5 SVT Contour E1 #5782
15.50 @ 88.92 frown
93 Lightning #1529
13.27 @ 101.55 on motor.
12.52 @ 107.28 on 125 shot.