I’ve seen plenty of worn out brakes, where the friction material is completely gone and it’s just the metal backing scraping against the rotor. All of those little particles of metal have to go somewhere, and the wheel is one of the first places it will go.
What happens to metal particles when they end up on the wheels? They turn to rust. When the brakes keep grinding away, more and more particles end up on the wheels, causing caked up rust on the wheels.
Even the outside of the wheel was starting to feel the affects of the rust buildup, with the Honda emblem on the center cap getting discolored.
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