Hey i have a 2004 Audi S4 and i have 19x8.5 niche f18's on it with bfgoodrich kdw 2's and 2 times now the tire has leaked air around the bead when mounted by one of those hands free machines that dont mess up and like leaked enough that when im driving it goes flat and totally shreds the tire.... does anyone have any suggestions as to why this is happening or what i should do