I hate cleaning rims, and so ceramic was my choice. They're the best in terms of low dust, low noise, and longevity. I have no problems with them.

The pad composition to stay away from is organics. Those things suck--especially for a +5kLbs rig like an X5.

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2003 BMW X5 3.0i -- MT5, 3.64s final gears, H&R lowering springs, K-Mac bushing kit
2007 BMW X3 3.0Si -- MT6