Today I came outside to find my rear driver side tire flat on my 06 Goat. I took the tire off and found about a 2 inch gash on the sidewall on the inner side of the tire. Any ideas what may have caused this? Is there anything on the inside of the wheel well that would have done this? I'd like to know because with on 5K miles on my car, I'd like the dealer to cover it under warranty.