From Hankooktire-eu.com: Kinergy eco : This tire was designed to satisfy customers riding comfort as well as maximizing fuel efficiency. Kinergy eco features & construction - Optimized pitch sequence - Optimized block stiffness - Wide straight 3 channel groove - Lateral shoulder grooves - Sawtooth type technology Kinergy eco’s Fuel Saving Technology was developed by combining new materials, such as nano-scale silica particles, using new mixing technology. These technologies help improve both fuel efficiency and wet braking performance. The favourite tyre from Turbogom.com's customers driving a PEUGEOT 807, CITROEN C8, RENAULT Clio, PEUGEOT 307, TOYOTA Yaris.