Alright, I have pumped the tires up 55psig, I will need to get a new tire pressure gauge because I just realized mine only goes to 50psig.
So, I had to use the gauge on the air pump at the gas station.
Peep this article:
Before you over inflate watch this. - Page 3 - CleanMPG Forums
I think I will try 60 psi on the next tank. The mpg gurus seem to get the best mpg and longer life at 60 psi without compromising safety.