Achilles ATR Sport 2 - Powerful Tire Description Attributes & Advantages Directional tread design Supplies great grip for wet and dry road problems. ATR Gen.2 (Superior Technologies Radial 2nd Era) Outstanding radial building. dB Quiet Technology Reduces sound which leads to a quiter trip. Four circumferencial grooves Exceptional water channeling that is broad, enhance wet grip along with to reduce preparation. Solid center rib Provides line stability to enhance management. Operation and interlocking tread block Improves stability. & #945 ° Technologies Improves cornering performance, help self cleansing, in water channeling.