Small Tear in Michelin Pro4 Tire, Does It Need To Be Replaced?
I folded a dollar-bill and placed it between the tube and tire on my last set of tires.  That lasted about four months before the tube finally pushed it's way out the tear and popped.  Safest bet is to replace the tire.  But in a pinch, the dollar-bill trick will at least get you home/to the bike shop.