[throwaway525142]

I think the friction of wheels is lower when the wheels lock up vs when they go with the speed of the road.

From Wikipedia[1]:

> Kinetic friction, also known as dynamic friction or sliding friction, occurs when two objects are moving relative to each other and rub together (like a sled on the ground). The coefficient of kinetic friction is typically denoted as μk, and is usually less than the coefficient of static friction for the same materials.[40][41]

[1]: https://en.wikipedia.org/w/index.php?title=Friction&oldid=10...