A bald tire is a tire with no tread on the tire surface ~ ~ It is suitable for use on dry roads ~ ~ to increase the grip ~ ~ A rain tire. As the name implies ~ ~ It is a tire with a revolving door designed for rainy days ~ ~ It has a wide and deep groove ~ ~ ~ which is conducive to discharging water from the road ~ ~ to enhance the grip on rainy days ~ ~ A gravel tire on the ice ~ ~ that is, a snow anti-skid tire ~ ~ There are many sponsors of WRC rally tires, such as Michelin in France, Bridgestone in Japan, German continental, Pirelli in Italy, Sumitomo in Japan and so on.