So after I had bought these tires second hand, they were still fairly new, I was told by some very experienced tire guys that the Pirelli tires fitted on new Volvos didn't last very long especially compered to the also factory fitted Michelin's. They said that it always was warn down on the inside, as I have a 9-5 on coilovers with way more camber than a stock 9-5 aero, especially a lot off camber on the rear wheels where I can't adjust it, I thought it was a real bummer that I had bought a tire known to be warn way too quickly on the inside and that my Saab was going to tear them upp way to quickly, and yeah this was true. I had to replace my front tires witch lasted me about a year, and they had about 6-7mm when I bought them.
I then bought 2 new Michelin Primacy 4's and they have far more grip and is a far superior tire in about every way. I'm actually surprised by how much they differ in both wet and dry grip.
They originally fitted the Michelin tires on the front axel, kinda cheap I know, but they had no lift... so I could really quiet feel the difference in grip with my 310hp fwd car. With the Pirelli's I can spin the wheels in second gear with a full gas and some little imperfection with the road but with the Michelins this was far more difficult. In the rain I would have to be a little bit careful to not spin in second gear, but with the Michelins this is not as big off a problem. And whit the new Michelin's in the front the back tended to almost step out while cornering hard. This got solved the second I fitted the Michelin's on the rear axel.