Originally Posted by marcel b
It states "Stoptech STR highpower brake saves per axle of the M3 over 8 kg". 2 axles would mean 16kg... sounds a bit high to me.
don't like the wheels, they do not fit the M3. There are quite some better and even lighter options. (e.g. from Advan, Volk)
Compare the weight of aluminum vs steel then it will make sense. The aluminum hat is the largest weight savings providing the car more performance as the rotational mass is lowered.