美国市场：汽车零部件及轮胎店销售额依然处于历史同期较高水平， 汽柴油消费量、汽车销量相对稳定，总体来看轮胎下游需求比较稳定。2025年2月，美国汽车零部件及轮胎店零售额为 102.57亿美元， 环比下降 4.60%，同比下降 0.92%。2025 年 3 月，美国汽油消费量为 878.43 万桶/天，环比上涨 2.90%，同比下降 2.00%；柴油消费量为 380.58 万桶/天，环比下降 5.66%，同比上涨 1.44%；美国汽车销量为 159.17 万辆，环比上涨 30.27%，同比上涨 9.39%。

A tire is an annular part that encircles a wheel rim and helps a vehicle wheels transmit the load from the axle to the ground while also supplying traction for the road they travel on. Tires are essential components of vehicles, providing traction, stability, and safety on various road surfaces. The market generally includes the production, distribution, and sale of tires specifically designed for vehicles, including cars, trucks, buses, and motorcycles.

Automotive belt tensioner pulleys can be defined as the devices used in automotive engines to maintain the proper tension of the belts that drive various engine components. These pulleys are essential in ensuring that the belts operate efficiently and do not slip or wear prematurely. The market encompasses the manufacturing, distribution, and sale of belt tensioner pulleys worldwide, catering to the needs of both original equipment manufacturers (OEMs) and aftermarket customers. OEMs are the major customers in this market as they require belt tensioner pulleys to be installed in new vehicles during production. The global automotive belt tensioner pulleys market includes various types of pulleys, such as automatic and manual tensioner pulleys, idler pulleys, and auxiliary tensioner pulleys. These pulleys are used in different automotive applications, including passenger cars, commercial vehicles, and off-road vehicles.

Biodegradable medical plastics are bio-based plastics that can be decomposed by the action of living organisms such as bacteria. Biodegradable medical plastics are degraded by microorganisms into water, carbon dioxide (CO2) and biomass under specified conditions.

轮胎行业：原料价格持续弱势，短期供需均存走高预期