E55 Rear tires premature wear - middle
what do you guys recommend for front and rear tire pressure?
i'm running yokohama AVS DB's that came from the previous owner and they're only about 7k miles old.
Surprisingly the treads look great on outside/inside tread, but I just realized today while looking carefully that the middle of the tread is almost bald. I recall about 2k miles ago it was under inflated and only in the low 20's psi, so i filled it up at the gas station to what it says inside the gas cap. the car's been driving great, but holy cow - the center is bald while the inside and outside treads both still look near new.
p.s. i just checked the front and they look like they're wearing evenly.






