Quote:
Originally Posted by CanAutM3
Fragile in the sense of easily damaged when subjected to an impact. A small ding with a wheel or a tool during a wheel change (you don't need to drop the wheel as @Tonymiabmw mentioned, just hitting the disc can be enough to damage it) or an impact from a rock while driving can mean a scrapped rotor. And did mention a rotor is bloody expensive to replace  ? |
This theory seems to be pretty flimsy given that the brakes aren't exactly made out of glass and there is an apparent absence of complaints from owners of M3/4/5/6 CCBs to support it.
Do you have anything more solid?