Originally Posted by b15

It can if you're really tracking the car. Every lb counts. For most of us though it'll go unnoticed. I've seen a lot of talk about switch tires to the Continental DWS- which are knocked for having a very soft sidewall. Even on my Altima I noticed their mushy feeling, I couldn't imagine that on the Z. IMO, I think this would take away from the driving experience much more than 20lbs of sound deadening + summer tires. But hey you know what they say, opinions are like....