tire pressure for 15 tires?

[manfrommanila]

hello there,
i am new to the forum i recently got my "08 aveo sedan" and i just purchased a wheels and tires from some guy via craigslist list , "konig helium 15' and nexen n2000 195/50" (yeah i know tires sucks). my stock rim and tires are "14' 185/60" and air pressure used to be 30psi on all tires. now just wondering how many psi should now i put on my tires? i currently had it 33psi on all??bad?? =D


thanks!!