2006 Hummer H3 Tag for tire pressure says 30psi. I have always ran 35psi in that size tire 265/75/16
Any opionions?

 

Yes, 30 PSI is too LOW.

Welcome to HF.

 

Welcome, 30 is too low. On my 06 H3 running Bridgestone Duelers. Keep them cold at 35 psi.

Works for me performance and average 17 mpg.

 

Welcome.. Your tires are p-metric, not constructed the same as LT tires. 35psi is safe for p-metric tires, yet during the hot summer months those pressures will go up, I recommend 32psi in the summer months, on p-metrics.
Check the pressures hot to see what you get and don't exceed 35psi.
My LT tires recommend 35psi, I run 38psi in the winter and 35psi in the summer, yet if I check them on hot days, they are 40psi, which has been fine with my tires since they are wearing evenly.
More information here::::>>>>>> H3tirepressure