Automobile tensioner single wheel usually adopts the following materials:

1. Metal tensioner: Metal tensioner is usually made of steel or aluminum alloy, which has high strength and wear resistance and can withstand high-speed rotation and high-temperature working conditions. Metal tensioner has a long service life and stable working performance, and is suitable for most automobile engines. However, the metal tensioner is relatively heavy, which may increase engine load and wear.

2. Plastic tensioner: Plastic tensioner is usually made of engineering plastics or polymer materials, which has light weight and good wear resistance and can reduce the load and noise on the engine. Plastic tensioner is relatively cheap, easy to process and replace, and suitable for some ordinary cars. However, the plastic tensioner has poor high temperature resistance and durability, and is easily affected by high temperature and high speed rotation.

3. Mixed material tensioner: Mixed material tensioner is usually made of metal and plastic, which has the advantages of both metal tensioner and plastic tensioner. The tension wheel made of mixed material has good strength, wear resistance and light weight, which can balance engine load and noise and prolong service life. However, the manufacturing cost of the tension wheel made of mixed materials is high, so it is necessary to pay attention to the selection of appropriate models and specifications when replacing it.

To sum up, the materials of automobile tensioner single wheel mainly include metal, plastic and mixed materials. Different materials of tensioner have their own advantages and disadvantages, and choosing the right material can improve the performance and reliability of the engine. When replacing the tensioner single wheel, it is suggested to select the appropriate materials and specifications according to the vehicle model, engine type and use environment to ensure the normal operation and stable performance of the engine.