The family owned tire shop I deal with claims they've had issues with them (and many other Cooper models) going out of balance often. The Coopers on my wife's mini van seem to support their claim as do the nearly new AT3's on a co-workers' truck. He's actually replacing the Coopers with another brand as the tire shop can't get them to balance.
I wanna like Coopers, but what I'm seeing and hearing about them these days makes me leery.
