Swoop Grooves According to research, rain is the weather phenomenon that causes the most traffic accidents in the summer. A sudden thunderstorm increases the possibility of temporarily losing control of your vehicle. A significant cause of this is the loss of grip or the threat of aquaplaning that can instantly turn the driver into a passenger. Nokian Tyres has designed special swoop grooves in its tires that improve their wet grip and prevent aquaplaning even under difficult weather conditions. The swoop grooves have been built on the transverse main grooves of the tire's inner shoulder. These elliptical indentations store more water as the volume of the transverse grooves increases. This design ensures excellent grip even as the tire wears down, since the swoop grooves are larger at the bottom. This makes their volume increase instead of decreasing.