Why is there Black grease on your car rims?

Black grease on car rims is typically brake dust. Brake dust is a combination of particles from the brake pads, rotors, and calipers that are created during braking. Brake pads are made of a variety of materials, including metal, ceramic, and organic fibers. When the brake pads rub against the rotors, these materials can wear off and create dust. The dust can be black, gray, or brown, and it can be deposited on the rims of your car.

Brake dust is not harmful to your car, but it can be unsightly. If you want to remove brake dust from your rims, you can use a variety of cleaning products. Some of these products are specifically designed for cleaning brake dust, while others can be used for general cleaning. To clean brake dust from your rims, follow these steps:

1. Spray the cleaning product onto the rims.

2. Use a soft brush to agitate the cleaning product.

3. Rinse the rims thoroughly with water.

4. Dry the rims with a clean towel.

You should clean your car rims regularly to prevent brake dust from building up. This will help to keep your car looking its best.