wearing

I had my car up on a ramp yesterday and noticed on the front two wheels the inside edge of both tyres is wearing quicker than the rest. Both have a sort of strange ridge forming about 10mm wide it kinda looks like its been melted and then set again (sorry for the stupid description but thats the...

i have a 1.6 altea ref sport 07 with 12700 miles on clock and i have had to replace the 2 font tyres (pirelli p7 ) is this normal or do i have to visit my dealer again:cry: