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bull?
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Posted by gorper (more from gorper) on Fri, 26 Mar 2004 08:08:11 Share Post by Email
In Reply to: Re: tires that suck = poor braking, serendipity, Fri, 26 Mar 2004 06:14:09
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"It's easy to lock up the brakes - that doesn't mean it's the best way to stop the car."

Thank you, I know that. You misunderstand: The *maximum* usable braking force is just shy of the point that the wheels lock, i.e., clamping forces exceed tire/road friction forces. Having brakes that can deliver more force than that is superfluous.

"Woefully undersized brakes can lock up even performance tires."

So what makes them undersized? Undersized brakes are brakes that are *unable to adequately dissipate the heat* they absorb for the conditions under which they're used, e.g., racing, towing, etc. Being "undersized" has nothing to do with the rate at which a car stops; it has to do with limited heat they can absorb before performance is adversely affected.

"The more energy you can bleed off (with better pads and rotors) without simply stopping the tire from turning (which requires almost no work from your brakes), the faster you'll stop."

Sorry, you are wrong. Read the article I linked to.

"Why do you think bigger cars have bigger brakes even with the same tires? Because there's more energy that needs to be bled to slow the car."

Well, yes, more KE must be converted to heat, but that has nothing to do with how *quickly* the car can be stopped and everything to do with how much stopping can be done before performance suffers due to inadequate heat dissipation.

posted by 65.117.20...

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