2012 Lexus LFA Owners Manual - Page 467

53

Braking

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Brake discs

Each brake disc is made from CCM (Carbon Ceramic Material) and features a two-

piece ²oating construction with an aluminum center hat. With this construction, disc

deformation due to expansion at high temperatures is more effectively mitigated;

thereby enabling a more consistent application of pressure from the brake pads for

stable and con±dence-inspiring brake performance under any circumstances.

CCM discs provide the high stopping

power and thermal capacity needed

to provide consistent braking at high

speeds.

The discs are impregnated with silicone

material to ensure outstanding stopping

power and endurance when they are not

yet at optimal operating temperature or

in wet conditions. However, one should

avoid spraying water directly onto a hot

brake disc. Furthermore, CCM discs

are susceptible to microscopic cracking

and local damage resulting from a direct

impact. Care is required when installing a

tire and wheel as accidental contact may

result in damage.

Bedding-in new brake pads or rotors:

In order to ensure maximum performance from a set of replacement CCM discs

or brake

pads, it is necessary to bed them in. Please consult your Lexus dealer

regarding the appropriate bedding procedure. The LFA is shipped from the factory

with pre-bedded CCM discs and brake pads.

The disc diameters are 15.35 in. (390

mm) for the front and 14.17 in. (360 mm)

for the rear. Both front and rear discs are

ventilated with 0.20 in. (5 mm) diameter

drilled cooling holes. The adoption of

CCM as opposed to conventional cast-iron

results in a reduction in unsprung weight of

approximately 11.03 lb. (5 kg) per wheel.