this may be a dumb question but..I got a nail in one of my rear tires. I've done some research and found that I like the Michelin Pilot Sport A/S. I was wondering if it would make a difference if I left the bridgestones on the front and put the michelins on the back?

 

Some tire don't work well together, others do. I'd assume these may not, since the Pilot Sport A/Ss are a performance tire, the the Goodyear All Seasons are not. However, I were you, I would try it. The worst thing that can happen, is that you'll need to replace the fronts as well. Nothing ventured, nothing gained however.

Good Luck.

Lou