Why Do Car Tires Turn Yellow?

[NicoleMarie]

The reasons for car tires turning yellow are as follows: 1. Brake pad powder metal rust Since brake pads contain iron, they wear and produce powder when braking. When encountering water, it turns into rust water and flows to the side of the tire. Over time, the sidewall will turn yellow. 2. Dust marks If tires frequently enter and exit construction sites, the sidewalls are prone to turning yellow. Without the habit of regular vehicle cleaning, a yellowish color from the soil can seep into the tire rubber, making it difficult to clean, but this is a normal yellowing condition. 3. Tire wax oxidation yellowing Since new tires are coated with a layer of tire wax, for vehicles often parked outdoors, the sidewalls are prone to yellowing because the tire wax oxidizes and turns yellow in high-temperature outdoor environments. 4. Premature oxidation of tire protectant The premature oxidation of tire protectant leading to yellowing is an abnormal phenomenon. Generally, when tires are not cleaned properly before applying the protectant, it accelerates the oxidation of the protectant, causing yellowing.