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I have been thru the P7's on my 2011, they became noisy and were removed with 4 mm tread remaining at 26k miles. Put on Stones 960 RFTs, which now have12K on them. So far they are superior to the P7s, I had several conversations with Pirelli Customer Service about the poor life of the P7s (which have a tread life warrantee of 40K for non OEM purchases). Bottom line you need to prove rotations every 7.5K, annual alignments and even tread wear (tyre pressures) in order for them to consider replacement.
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