need help with tire ?

i am thinking about putting the port o walls on my truck question i have is should i run the 1.25" or the 3" whats everyones opinion on that.. and if you know where i can find some cheap let me know that as well..

What are port o walls?

basicly like a fake white wall.. they go on between your rim and tire to make you look like you have a white wall..

I would go with the 3"