Dunlop GT Qualifiers 225/50/R15

They came with the rims that I bought off of one of my friends who used to own a '96 mystique. They sat in storage for almost 5 years. The tires have always gotten horrible reviews, it wouldn't suprise me if they're the culprit. But they still seem to have some tread life on them, and I didnt want to replace them prematurely if new tires would do the same thing.