Avon Spirit ST Tires The Avon Spirit ST Tires redefine traction, blending a novel multi-compound mixture with advanced 3D sipe technology to ensure unwavering grip and enhanced feedback across both wet and dry terrains. Features: 3D siping with interlocking three dimensional points to improve stability and grip, limit tread ex, and allow the tire to warm up quickly 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