- Zigzag center rib design increases grip performance on straight way. - Four broad circumferential groove design with 35% void ratio enhances drainage efficiency and maneuverability on wet road condition. - Broad circumferential groove design (outside groove wall angle - inside groove wall angle) drains water more easily, and even prevents slipping. - 3-Dimension arc groove design between blocks helps increasing stiffness between blocks, and also disturbs air flow in grooves. - Applying "groove in groove" concept on circumferential grooves disperses stress on tire surface, and prevents irregular wear and noise produced by the friction between air flow and groove wall. - Separating circumferential grooves and radial grooves decreases rolling noise. - Adding sipes and thin grooves on blocks and shoulders balances block stiffness and riding comfort.