Recently I replaced my rear oem 255/40R19 tires for 275/40R19 size that are mounted on oem brembo wheels (9X19). My door decal mentions a 35 psi tire pressure for oem size tires. Which should it be the right psi for both size tires for street driving and for track work?

 

I just got new tires and the same size, (32 psi) and the rear of my car feels loose ??? Not sure y, maybe I got the wrong psi.

 

I have 35 psi. Car feels OK

 

My falkens say 51 psi max. I was at 40 for a long cruise. Hope it wasn't "overinflated"

 

I think 51 psi is the max including heat and load after drving