What is a tire?
Q: What is a tire?
A: A tire is a ring of material that covers the rim of a wheel.
Q: What kind of material are most road vehicle tires made of?
A: Most road vehicle tires are made of rubber.
Q: Why do vehicles need tires?
A: Tires help vehicles to move smoothly.
Q: Do some metro trains and trams use rubber tires on their wheels?
A: Yes, some metro trains and trams use rubber tires on their steel wheels.
Q: When do tires need to be changed?
A: Tires need to be changed after their treads wear away.
Q: Why is driving with worn tires dangerous?
A: Driving with worn tires is dangerous because it can cause the tire to explode and the driver to lose control.
Q: What were tires made of before the invention of pneumatic tires?
A: Before the invention of pneumatic tires, tires were made of leather for thousands of years, and of iron or steel for hundreds.
