Has anyone ever used these before? From what I can tell they've been around for a while but maybe new to the US?
http://www.discounttiredirect.com/direct/findTireDetail.do?ra=searchTiresBySize.do&fl=&pc=10652&counter=0&ar=30&rd=18&cs=295
http://www.hankooktire.com/global/competition-cars-tires/hankook-ventus-td-z221.html
http://www.trackhq.com/forums/f296/hankook-ventus-td-nt-01-fighter-4577/
http://www.discounttiredirect.com/direct/findTireDetail.do?ra=searchTiresBySize.do&fl=&pc=10652&counter=0&ar=30&rd=18&cs=295
http://www.hankooktire.com/global/competition-cars-tires/hankook-ventus-td-z221.html
http://www.trackhq.com/forums/f296/hankook-ventus-td-nt-01-fighter-4577/