- The performance-tuned asymmetric tread is optimized to handle both wet and dry conditions while maximizing cornering grip and handling stability - Large continuous tread shoulder blocks provide maximum dry grip and stability under cornering loads - A combination of continuous and semi-continuous intermediate ribs work together to provide stability at highway speeds under varying conditions - Continuous ribs and shoulder block elements with variable-pitch groove spacing help to reduce tread noise for a quiet ride - Quadruple circumferential tread grooves offer maximum water dispersion for excellent wet traction with minimal hydroplaning - A silica-enhanced tread compound improves both wet traction and rolling resistance (resulting in reduced fuel consumption) - All sizes of the Phi come with a built-in rim guard to help protect expensive wheels from curb damage - The Accelera Phi is available for 16" through 22" rim sizes and widths ranging from 205mm to 275mm