Product: Ultra Performance Tyres Model: A-ONE Description: 1.Center straight-ling rib: The continuous grouding on the road helps straight running stability at high speed, excellent steering response in unexpected handling. 2.The curved conversion of running directional groove edge: The curved conversion from the edge spot of groove on running direction. Grounding pressure distribution of block. 3.Arrangement of the variable pitch 5 optiomized sizes of tread block can disperse and reduce noise from the tire. It realizes the quiet riding. 4.Running direction groove: The optiomized 4/3 grooves enhance both the performance of drainage on the wet road and the efficiency of high speed driving by reducing water pressure on the grounding spot.