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      12-28-2022, 01:40 PM   #21
irablumberg
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Drives: 2021 M5 Competition
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One other factor that may be of concern to some has been mentioned. That is that CCB rotors are fragile. If you plan to swap wheels yourself on even an occasional basis, this may be relevant.

In my experience, the stock wheels and even my lighter aftermarket wheels with tires mounted are quite heavy and unwieldy. As a result, there is significant risk of a wheel slipping and hitting the rotor when changing wheels. With steel rotors, no problem. With CCBs, such a slip could easily chip the rotor at a cost of $4K to replace.

You can reduce this risk somewhat by using the wheel mounting rods that thread into the wheel bolt holes. However, even with these, there is still some risk.
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