BMW F97 Technical Training Manual page 56

F97/F98￿Complete￿Vehicle
5.￿Chassis￿and￿Suspension
The￿M￿compound￿brake￿provides￿even￿greater￿braking￿power￿than￿the￿sports￿brake￿offered￿on￿the
G01/G02￿BMW￿X3/X4￿M40i.￿In￿a￿direct￿comparison￿it￿also￿offers:
• Reduction￿in￿the￿vehicle￿weight,￿resulting￿in￿improved￿agility￿and￿dynamics,￿accelerating￿ability
and￿fuel￿consumption
• Reduction￿in￿the￿rotating￿mass,￿resulting￿in￿improved￿accelerating￿ability,￿response￿and
handling
• Increased￿fading￿stability￿and￿greater￿thermal￿resistance
• Perforated￿disc￿ring,￿sports-style￿look,￿optimized￿response￿characteristics￿in￿the￿wet
• Usage￿of￿intelligent￿lightweight￿construction
• Technology￿transfer￿from￿M￿sport
• Unique,￿authentic￿M￿design.
Designation
Front￿brake
Brake￿disc,
front
Rear￿brakes
Brake￿disc
Parking￿brake
The￿front￿brake￿is￿entirely￿specific￿to￿the￿F97/F98.￿It￿is￿a￿large,￿perforated￿M￿compound￿brake￿disc
combined￿with￿a￿four-piston￿fixed￿caliper.￿The￿brake￿disc￿diameter￿is￿47 mm￿larger￿than￿that￿of￿the
G01/G02￿M40i.￿The￿exterior￿of￿all￿brake￿calipers￿is￿blue￿metallic￿in￿color￿with￿the￿M￿logo.
F97/F98,￿front￿brake
52
Unit
4-piston￿fixed￿caliper
[mm]
1￿piston,￿floating￿caliper
[mm]
G01/G02￿M40i
348￿x￿36
345￿x￿24
electro-
mechanical
F97/F98
4-piston￿fixed￿caliper
395￿x￿36
1￿piston,￿floating￿caliper
370￿x￿24
electro-
mechanical