Ultra High Performance Asymmetric SUV You want it; you've got it from the N Fera RU5 traction, great handling and strength for all seasons. The tread design incorporates waves, grooves and a micro-grooves to deter hydroplaning as well as improve grip - whether it's raining or snowing. A second outside rib spanning asymmetrically to the inside creates stiffness for greater stability and cornering ability. For high performance SUV, this is your tire.