Quote:
Originally Posted by CSG Mike
Because improper bedding 
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Or over heated.
Regarding race cars or "track pads";
Sometimes race pads just squeal because they don't "need" to be quiet so a manufacturer doesn't even focus on that. Squeaking is actually the nature of brakes because the friction creates a type of vibration and sound (squeaking) by definition is vibration, albeit a very very fast vibration.
Typically improper bedding yields an uneven transfer layer that will make your car feel like it's trying to shake itself to pieces. I've spent several thousand dollars chasing that devil. Now I won't spend a dime on any pad that is "sensitive" to bedding. (cough, carbotech, cough)
There was a joke back in the day (I think it came from a very old commercial) where a driver of a German sports car complained over and over to the German manufacturer of the brakes about their squeaking, to the point where he was put in touch with the senior rep for the company. The senior rep told the customer, in his heavy German accent: "We make zee brakes to schtopp good, not schound good." :click: End of conversation.
EDIT: Ok, I can't fart in the elevator without adding some value. Thus, I have a question in which I don't know an answer to. Mike: What parts in the suspension have the greatest bind and would have the greatest improvement from using spherical replacements? Also, for a dedicated track junkie, are their any parts that should be reinforced or replaced with something stronger because of fear of breaking prematurely?