My wife's 2.5i has the RE050AS Pole Postion tires on it. It is by far the best tire I have ever driven. The tires have about 24000 miles on them and I just had them rotated and there was hardly any wear on the inside of the back tires. Virtually unheard of on a Z4. We've had no problems in any weather. Being an all-season tire, they are great year round. We live in Arkansas and while we don't have harsh winters with snow, we do have the occasional flurries and ice. Still, no problems. They are absolutely amazing in wet. Anyone that says avoid these at all costs is crazy. BTW, I purchased these at Tire Rack in Mar 08. 