Originally Posted by Whaazup17
Ok. I know that bigger rotors equals more contact with the brake pad so better stopping power which equals faster stopping and the better chance of locking your wheels.
Not always, some big brakes have the same size pad as smaller stock brakes.
The larger rotor has the advantage of proving a larger radius that gives the friction material a mechanical advantage over a smaller rotor when it comes to trying to keep the wheel from turning, and the larger area of the disk makes it better at adsorbing and dissapating heat.