Originally Posted by
gregf83
No you're wrong about the absorption. The rims (black, white or any other color) absorb heat due to friction not radiation. They cool themselves through radiation (black helps this) and also conduction to the brake assembly (color makes no difference here).
The primary cooling method is convection into the surrounding air, not radiation. Again, color makes effectively no difference.
Also, any comparisons to the heat transfer problems associated with the space shuttle don't pass the straight face test.