Quote:
Originally Posted by tommytexter
What a shame they keep putting cheap ass ugly as fcuk single piston floating caliper on expensive performance oriented cars/suvs especially the front caliper is big and fixed and 4/6 pistons.
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I'm just guessing, but I believe it's because of the electronic parking brake. I'm betting that BMW has a combination floating caliper that functions as the parking brake as well. Honestly, this probably has a net positive gain in performance due to the lower unsprung mass of the caliper as well as not requiring the drum parking brake. Fixed caliper brakes are heavier and provide very little benefit on a road car like this in the rear. The extent of "performance" driving an X3 M will undergo in its life are stop light rag races and excessive speed while weaving in and out of traffic on the freeway. These are not really activities where a fade-free brake system is needed.