Is Your Car Equipped With The Right Brake Disc Rotors? Find Out More

What is a disc rotor?

The metal discs/ plates found between the chassis of the car and the tyres are known as the Disc Rotors. They are a very important part of the braking system that works along with the brake pads to stop the wheels from moving when the brakes are applied. Brake pads clamp down on to disc rotors to cease the motion of the wheels.

While our cars kept getting faster, the need for powerful braking system also went up, giving birth to the disc brakes. Qualities such as greater stopping power and less overheating quickly made disc brakes the preferred choice over the conventional drum brakes.

How do they work?

All disc brake systems are made up of 5 different parts, namely Disc Rotors, Brake Pads, Piston, Calipers and Sensors. Disc rotors are an important component in the braking system and are responsible for stopping the wheels from spinning. When the driver hits the brake pedal, a piston inside the brake master cylinder pressurizes hydraulic fluid in the brake lines, which moves the pistons and pushes the pads into the rotor. The harder the driver pushes on the pedal, the greater the pressure inside the brake lines will be, and the harder the pads will squeeze the rotor ultimately stopping or slowing down the rotor.

What are the types of disc rotors available?

There are 3 major types of disc rotors available – Smooth,Drilled and Slotted. All of them are designed to withstand high temperature during the brake application and have their own advantages and disadvantages.

 smooth brake rotorsSmooth Brake Rotors. They work fairly good under normal driving conditions and that’s why most entry level sedans and hatchbacks come equipped with them. They offer more surface area than any drilled or slotted rotor which works perfectly as a heat sink and also they are not prone to cracking under extreme brake temperatures like drilled rotors can be.


drilled rotorsDrilled Rotors. They are OEM style blank rotors which have been drilled to allow hot gases to escape that builds up between the brake pads and the rotor through the holes. But the downside of drilling holes in your rotor is that they get weak near the holes and crack due to excessive heat generated by extreme brake temperatures.


slotted rotersSlotted Rotors. As the name implies, slotted rotors use slots carved into the face of the rotor to move gas, water and heat away from the surface of the rotors. They offer extra durability over the drilled rotors as they are not weakened by presence of any holes in them. That’s why they are being chosen over drilled rotors by many racetrack car drivers.


However, they are not perfect either and wear down brake pads quicker than the drilled rotors. This is why most performance or street cars come equipped with drilled rotors.


  1. Average life of Disc Rotors is 20,000 – 30,000 kms subject to individual driving pattern, braking pattern and the kind of roads the car is mostly driven on.
  2. It is possible to buff the scratched and worn out rotors to extend their life. So, before getting them replaced you can get them checked for any possible buffing.


Automen Verdict

If your car is a city driving car then there is no need to get your brake rotors changed to drilled or slotted. However, if you are one of those who value looks then you might want to go for drilled rotors. But for racetrack cars you can switch to slotted rotors.

Are your Brakes/ Discs making any funny sounds? Call Automen on 8010696969 and get your brakes replaced at your doorstep.