What role do tires play in braking and heat dissipation?

• A. Tires primarily cushion the aircraft during landing and offer little braking capacity.
• B. Tires provide braking traction but do not affect heat dissipation.
• C. Tires dissipate heat through the braking system but do not affect traction.
• D. They provide braking traction and dissipate heat; worn tires can fail under heavy braking.

Answer: (D)

Tires are directly involved in both braking traction and heat management during deceleration. The tire-road interface is where the braking force actually gets converted into a reduction of speed; the tire must have enough grip (traction) to transmit those braking forces without skidding. At the same time, braking generates a lot of heat, which is shared among the brakes, the wheel, and the tire. The tire’s surface and internal structure must absorb and shed that heat into the air, helping keep the tire temperature within safe limits while maintaining grip.

Worn tires have less tread, weaker structure, and reduced ability to grip and to dissipate heat. Under heavy braking, they’re more prone to overheating, loss of traction, and potential failure (like tread separation or blowouts). So the correct idea is that tires provide braking traction and help dissipate heat; worn tires can fail under heavy braking because both grip and heat handling are compromised.