So, a brake intended to slow down (not necessarily stop) a round track race car that weighs less than a fourth as much as the truck it's on is somehow an "improvement" over a drum brake that was engineered to handle full gross weight loads (or more likely an overload)? Whatever the OP has been smoking must be some primo stuff!
LOL!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!