One thing that people tend to overlook is the added safety that these 18" ultra-high performance summer tires bring in terms of reduced braking distance and increased evasive abilities. Both are very useful capabilities in avoiding accidents. Also that
particular Michelin tire is light weight (22.1 lbs) and constructed with Michelin's "Green X" low rolling resistance rubber so you're not going to give up much if anything in rolling resistance to another Focus tire with less performance.