i have 245-40-19 and 275-35-19 and had it at 35 front and 38 rear, but after tires warmed up, they typically increased to 38 and 41 and i felt the car was too stiff and would feel every bump. I have since reduced it to 32.5 and 35.5 (increases to abut 35.5 and 38.5) and have found it to be much more comfortable. but I'm not sure if its bad to be 2.5 psi under the recommended pressure
i live in texas though so temps can get pretty high
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