rockauto lists weights of the drums.
not sure what a narrow 11" is.
or a wide 10".
applications?
For the 87 M body the 10" is 19lbs, 11": is 23lbs for just the drums.
Guess you can figure which is more all together (hint 11")
Steve - actually the 11" incurs a double penalty. The majority of the drum's mass is at the perimeter, this means the rotational inertia is much higher. So, in addition to the extra weight you have to accelerate and carry unsprung, you also have to accelerate this mass rotationally! That is why a disk brake rotor, even if it weighs about the same, is better for racing. The mass of the rotor is distributed differently and its moment of inertia will be lower (given the same total weight).
