Here are a few basic concepts involved in braking systems. The larger the rotor used, the more effective the braking system will be.
As the mass of the rotor increases, it's ability to hold the heat created during
braking increases correspondingly.
Rotor heat dissipation is augmented by adding cooling vanes.
Curving the rotor's cooling vanes draws more air through the rotor, allowing it
to run cooler.
Adding rotor thickness increases cooling airflow and adds heat dissipating
As the brake pad surface area increases, the clamping force created is distributed
across a greater surface area - and so is the heat generated during braking.
The effectiveness of the clamping action is greater when pistons are placed
on both sides of the rotor.
The ratio of the master cylinder piston area to the caliper piston area
determines how hard you must press the brake pedal to develop the clamping
force required to slow the vehicle.
And on the flip side...Changing the ratio of the master cylinder piston area to the caliper piston(s) area
can change the engagement point of the brake pedal (up or down).
As the rotor size increases, there is a gyroscope effect on the front wheels - making
steering more difficult.
As the weight of the rotor grows, so does your unsprung weight.
Lightweight aluminum calipers do not offer the strength of steel, and are prone to
"spreading" at the center due to the force of the hydraulic pressures involved.
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