The N'fera SU4 from Nexen Tire Americas Inc. is now available in the U.S. market exclusively from Tire Dealer's Warehouse (TDW), a division of the Hercules Tire & Rubber Co. through TDW's 14 warehouse locations and through Hercules Tire's network of independent wholesalers. The N'fera SU4 is an ultra-high performance asymmetric summer tire designed for optimum driving with good drainage and grip on wet surfaces. It is available in 47 sizes ranging from 255/35ZR19 to 175/65R14.