I read in one of the releases that they are fixed calipers in the front (4 piston), with rotors fabricated separately from the hat. The rear are sliding calipers.
edit: found the info
Quote:
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Originally Posted by BMW Press Release
Powerful, reliable, and light: high-performance brake system.
Outstanding stopping power with fading reduced to an absolute minimum
is guaranteed by the high-performance brake system combining four-piston
fixed-calliper brakes at the front and swing-calliper brakes at the rear with
inner-vented lightweight brake discs.
The brake discs themselves measuring 395 mm/15.55" in diameter at the front
and 385 mm/15.16" at the rear feature a riveted connection joining the aluminium
brake holder and the grey-cast-iron friction ring to effectively counteract
any heat-induced deformation even under maximum loads.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
Last edited by JCL; 04-05-2009 at 02:52 PM.
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