Because the grooves increase yhe friction
There is usually never a benefit from the grooves but to give the car a sleek and "cool" look and more appealing!
The grooves (treads) are there to give better grip (like car tyres) on wet and slippery surfaces.
You should change tires when you look at the grooves and they are ground pretty smooth. You want grooves in your tire so that it has good traction. If you put a nickel in-between your grooves and it doesn't stick out, then your tires are still good.
If you drove your car for too long and the pads were worn out then there will be small grooves or either big grooves from were the metal was rubbing against the rotor. If it has big grooves in it then they probably need to be changed or on some you can turn your rotor around and still use it. If it has small grooves it should be ok. Hope this is some help to you.
The original Ping Eye golf clubs had v grooves.
I assume you mean GROOVES - the Glacial Grooves were formed by the receeding glaciers.
so they can have more traction
A quarter has 119 grooves, or reeds. The grooves are used as an anti-counterfeiting strategy.
Car tires cover the wheel rim. They are made of rubber with grooves to provide traction and act as a cushion to absorb the shock from large bumps or jolts.
Infectious Grooves was created in 1989.
a quarter has 130 grooves.