tire people help

well quick question, Im currently running some 165 r15 86t in the front of my dart and I need to go a bit smaller due to fittment issues.. But I dont want to go to terribly small were it eats potholes and looks like a low-pro tire on 20"s
So can I knock it down a little bit? tire size sugggestions? a little shorter/thinner is what I need.