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e.g. busses, garbage trucks, etc are very squealy when they brake. Is this due to their use of air brakes, or apathetic maintenance, or something else?

e.g. busses, garbage trucks, etc are very squealy when they brake. Is this due to their use of air brakes, or apathetic maintenance, or something else?

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[–] • 0 pt

They're probably using metallic brake pads to increase durability, but they squeak quite a bit. They also eat up the drum or rotor much faster.

[–] • 0 pt

Hi-carbon rotors and semi-organic pads for the win!