Recently, the American Rubber Manufacturers Association (RMA) predicted that the sales of domestic tires in the United States in 2010 will rise by more than 9% year-on-year in 2009, with the most significant increase in the sales volume of original passenger car tires, light trucks, and truck tires . RMA believes that the increase in tire sales will benefit mainly from the US domestic vehicle production, especially the recovery of light truck sales, and the reduction in the interest rate on auto loans in 2010. Due to factors such as increased vehicle mileage, stable energy prices, and extended vehicle life, sales of spare tires will also increase significantly. It is estimated that the sales volume of tires in 2011 will increase by 2% on the basis of 2010, reaching 290 million pieces. The Rubber Manufacturers Association is made up of tire market professionals who come from 90% of tire companies in the United States. They have made the above predictions after analyzing the tire industry and economic data, government trade figures, and automobile production and sales. Zhejiang Kefeng Sensor Co., Ltd. , https://www.kefengsensor.com