Originally Posted by Chuck33079

Right, that's why I was remembering 1.4x- One pound lost from the rotor is about 1.4 pounds of unsprung weight lost. i.e., it's not as dramatic as we would want to believe. Will you notice a difference between stock and rotors 20 lbs lighter than stock? Absolutely. Will you notice a difference between rotors 20 lbs lighter than stock and rotors 21 lbs lighter than stock? Not a chance in hell.