What Causes Blackening of Rims Over Time?

[CodyFitz]

The reason rims turn black after prolonged use is that during braking, the brake calipers and brake discs rub against each other, generating carbon dust. If this carbon dust is not promptly removed, the heat generated by the aluminum alloy rims can cause the dust to bake onto the surface, forming a hard, dark brown layer that cannot be washed off with water. To prevent this, it's essential to regularly clean the rims when the car is still new. For daily-driven vehicles, the rims should be washed at least once a week. Start by rinsing them with water, then use a cleaning agent and a sponge to scrub, followed by a thorough rinse with plenty of water. In terms of materials, car rims are mainly divided into steel rims and alloy rims.