I haven't used Michelin in a while. My recollection of the Pro4 Race is that they had prodigious grip but could bite you if you overcook it into a corner. Once you reach their limit they let you know it, start to get skittish and jittery. I tend to brake hard into turns and have had a front tire jump around on me as it repeatedly lost and regained traction. Not very forgiving at the limit.