A wheel cleaning brush is a specialized detailing tool designed to clean brake dust and road grime from alloy wheels. Unlike body brushes, these are shaped to fit between the spokes and reach the inner barrel of the wheel. They use bristles that are stiff enough to agitate baked-on brake dust but soft enough not to scratch delicate clear-coated or chrome finishes. Using a dedicated brush prevents transferring metallic brake dust particles to the car’s paintwork, which causes scratches.