Summer Fuel Efficiency and Economy The ZIEX ZE914 ECORUN is a hybrid vehicle tire with the cost saving fuel efficiency of a Low Rolling Resistance Compound, engineered with performance in mind. This tire features an asymmetric tread pattern with four straight wide circumferential grooves for hydroplane resistance along with a dual high rigidity rib construction, allowing good wet and dry braking stability. Slots and sipes can be found throughout the tire, optimized for even tread wear with a comfortable ride while providing additional traction. With a size list ranging from 15-inch to 18-inch and speed ratings of H, V and W, the ZE914 ECORUN is a great tire for enthusiasts looking to save at the pump.