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Originally Posted by JSH
Drum brakes are increasingly rare on medium and heavy duty trucks in the USA today.
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It still has a greater market share in other countries, and even top-tier makers such as Volvo and Scania have to offer such option in Brazil and parts of Africa for instance. Odd enough, other manufacturers such as Isuzu offer disc brakes on certain models within the lightest and heaviest categories, yet most of the intermediate models retain drums all-around.
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The Freightliner Cascadia comes standard with disc brakes today - with the option to downgrade to drums.
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Such option remaining available just shows how drums might not be that bad at all, for the right applications, or if the operator or a fleet manager is too concerned about discs bending under harsh operating conditions.