Definitions for "BRAKE DISC"
The basis of a disc brake system: a round metal disc which rotates with the road wheel and, in order to generate braking power, is clamped by a caliper holding two friction linings (pads).
The flat rotating member of a disc brake which is contacted by the friction pads when hydraulic pressure from the master cylinder (see) is routed to the caliper.
Braking system component comprising a revolving metal disc that spins with the wheel and which can be slowed by squeezing two or more stationary friction pads against it.
Keywords:  contend, sink, stress, mass, heat
a heat sink, remove mass and you increase the stresses it will have to contend with
a heat sink, so removing mass increases the heat stress it will have to contend with