Recycling car tires is a process that involves breaking down the tires into materials that can be used for other purposes. One common method of recycling tires is to shred them and use the resulting rubber granules as a filler in construction materials or as a fuel source. Another option is to recycle the rubber and steel in tires into new tires or other products. There are also companies that specialize in recycling tires and offer services to collect and recycle old tires.