Nfera Ru1 Sport Performance Suv. The N’Fera RU1 is a high performance asymmetric tyre that provides best-fit handling and braking based on new technology, adopted to deliver an unrivalled driving experience for SUV owners. The asymmetric design provides excellent drainage performance and the large number of sipes help provide a quiet ride. The RU1 provides outstanding handling and steering stability for a safe and easily managed drive. The special balanced rib design provides stability for high speed driving. *By request/order.