Quote:
Originally Posted by BMWisBest
F10/F13 rear brackets are made to fit OE 396x24 larger and skinnier rotors which are not available.
So you need a bracket like the F90 to fit 390 or 380x28 rotor, but unfortunately it can't be mounted to the F10/F13 spindle due to different mounting spreads, this is an usual scam played by car mfgrs to disallow easy swapping but we know the tricks
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I get the thickness but what are you solving for? If you just want to replace the CCB with Iron, the cheapest and fasters option would be to go with OEM that has already been designed for the car and set proper bias between front and rear brakes.