Amazing Production Process of Truck Brake Drum from Old Truck Engine Head | Manufacturing Brake Drum

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Drum brakes can provide more braking force than an equal diameter disc brake. Drum brakes last longer because drum brakes have increased friction contact area than a disc. Drum brakes are cheaper to manufacture than disc brakes. Rear drum brakes generate lower heat.
Big rig trucks are about the only vehicle that still uses drum brakes. Even buses are mostly all disc brakes.
Amazing Production Process of Truck Brake Drum from Old Truck Engine Head | Manufacturing Brake Drum

The reason manufacturers still build their trucks with drum brakes is simple: cost. Drum brakes are cheaper than disc brakes. It doesn't mean that you have to keep drum brakes on your truck.

The brake drums on your car are built to last for about 200,000 miles. In some cases, the drums will wear out sooner due to worn out internal components that put more strain on the drum. As your brake drums begin to wear down, they will actually become smaller.

How to tell whether your brakes are drum or disc. To double-check, look through one of the holes in the top of your front wheel. If you see a shiny smooth metal surface, that is your disc rotor. However, if you see a rusty and not smooth round surface, that's your brake drum.

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