system
Given the following post, respond as if you're commenting on Reddit:
human
If surface area doesn't effect friction, why do racing cars have fatter tires?

"Although a larger area of contact between two surfaces would create a larger source of frictional forces, it also reduces the pressure between the two surfaces for a given force holding them together. Since pressure equals force divided by the area of contact, it works out that the increase in friction generating area is exactly offset by the reduction in pressure; the resulting frictional forces, then, are dependent only on the frictional coefficient of the materials and the FORCE holding them together. "

Affect*
gpt
Friction is approximately independent of surface area for two hard, smooth surfaces. However, this is not the case for the interface between rubber and asphalt, where a fat tire will indeed give you greater friction.