I put on four new Pirelli P zero Nero M+S about a year ago. They have about 25k highway miles on them and have a lot of meat left. I got a nail in one, and put a plug in it (it was too close to the edge for a patch). It held up pretty well for a month, but now developed a slow leak.
If it was 2WD, I wouldn't even ask, but with can I get away with replacing only two tires? It would be a shame to replace all four with so much lif left in them. Thanks.