[ecomodded]

I think a lot of people confuse tire types,as the nitrogen installer did.
The old bias ply tires from days gone bye would indeed wear out the center first if over inflated.
The new stronger wider steel belted radial tires are usually rated somewhere around 42 lbs to 50 lbs max pressure.
Often the front tires will have bald edges,if excessive it is due to worn/ loose suspension parts.
My tires also get louder with higher air pressure, i keep them at 50.