I have two Dunlop Direzza DZ101 tires 245/45/18 with 50% tread. One has a plug but holds air fine. $90 shipped for the pair.
http://img.photobucket.com/albums/v157/Dlorah/SUC50116.jpg
http://img.photobucket.com/albums/v157/Dlorah/SUC50118.jpg
http://img.photobucket.com/albums/v157/Dlorah/SUC50120.jpg