What is the main disadvantage of multiple disk brakes?

• A. They do not dissipate heat well
• B. They are very noisy
• C. They require large hydraulic systems
• D. They corrode quickly

Answer: (A)

Heat management is the key factor here. When brakes apply, kinetic energy becomes heat, and removing that heat quickly is essential to prevent brake fade. Adding more discs increases braking surface and can improve stopping power, but it also grows the thermal mass and can create a more tightly packed stack that restricts air flow. The result is heat tends to stay trapped and dissipates more slowly, especially under repeated or heavy braking. This makes heat buildup the main drawback of multiple disk brakes.

Other characteristics like noise, hydraulic system size, or corrosion relate to design details and materials and aren’t the primary limitation affecting braking performance in the same way heat dissipation is.