My current experience with Pirelli P Zero All Season tires on my BMW has been much worse. They're factory-fitted, but the car's handling is unpredictable. Some days, it's bearable, while others, tramlining (following road grooves) terribly on the same roads at the same speed, seemingly temperature or maybe moisture dependent. After about 350 miles, highway driving feels like I'm navigating a high-speed boat in choppy water. These tires might excel on German autobahns, but they're far from ideal for Colorado's concrete roads. The ride comfort is virtually non-existent; they transmit every road imperfection, even with the adaptive M suspension in comfort mode. Uphill driving on curved roads induces a slide-like feeling. I'm extremely disappointed with these tires.
I've tried adjusting tire pressure with no noticeable improvement.

