Tire - Spirit ST - Rear - 180/55ZR17 - (73W) Interlocking three-dimensional points hidden in the sipes to improve stability and grip, limit tread flex and allow the tire to warm up quickly (3D Sipes), Highly loaded silica compound combined with state-of-the-art polymer technology for excellent wet and dry traction and handling, Avon's latest technology construction design gives ultra-high-performance handling and stability characteristics, Ultra high-performance sport touring tire