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Originally Posted by anassa We also see minimal change in rotor diameter from other models: z3m/e36 m3 = Front 315mm - Rear 312mm e46 330ci = Front 325mm - Rear 320mm |
That's interesting .... the equations and figuring brake bias is pretty befuddling to me so I won't pretend to understand it ... but I know it can be a factor and will decrease braking performance if not considered.
One thing you didn't mention, distance from center of the hub to the caliper is a factor in stopping power. The larger diameter is not just about heat dissipation, it's also about leverage. That's also why larger diameter rotors stop better.