Question

if plane surfaces have more friction then why old tyres have less friction

Answer 1

because their sticky material and holes/spaces for providing friction reduces

Answer 2

Hello friend,
You are a little misunderstood.

- Friction depends on smoothness of the surface.
- Plane (smooth) surfaces have lesser friction as compared to rough surfaces.

◆ Why old tires have less friction -
- Due to continuous wear and tear, traction is worn off.
- As tyres become soft, coefficient of friction is decreased.
- Therefore, old tyres causes lesser friction as compared to brand new ones.

Hope this helps...