What is the approximate size of the patch of tyre that is in contact with the road?

The size of the patch of tyre that is in contact with the road is approximately that of a hand. This contact patch can vary slightly depending on the type of tyre and vehicle but is usually around the size of a hand for most cars. This limited contact area is crucial for vehicle handling, grip, and braking since it means that all the vehicle's weight and traction must be effectively managed through a small surface.

A larger size like a dinner plate, basketball, or shoe would inaccurately suggest that more of the tyre is making contact with the road than is typical, which could mislead one to think about handling dynamics or traction differently. Understanding that the contact patch is roughly the size of a hand can help drivers appreciate the importance of tyre maintenance and proper inflation in ensuring optimal contact with the road surface.