Remember this acronym: WCTA. Wide Custom Tread Arc is the full name for the profiling Avon uses to give its new cruiser tire, the Cobra, nimbleness at both low and high speeds usually reserved for cutting-edge sportbike rubber. Further, jointless belting locates carcass fibers closely at the center of the tire for stability and wear resistance, and wider apart at the edges for greater compliancy at deep lean angles. The Cobra is available in 19 sizes, all with Avon's serpent-like Force Following Grooves tread pattern. Prices start at $165 for fronts and $300 for rears.