Specifications

297x198_RS4_Fas09_RZ.indd 34 18.02.13 14:32
34 Brake systems
The standard 18-inch RS high-performance brake
system takes a powerful hold with its 8-piston
fixed callipers on the front axle. Its wave brake
discs comprise a cast friction ring with a wave-
shaped outer contour which is connected to the
brake disc chamber by means of aluminium pins.
This so-called floating mounting ensures that the
friction ring remains tension-free to a major extent,
improving stability under high temperature loads.
In addition, the axial perforation and cooling
channels for internal ventilation increase the
brake discs’ performance. The use of aluminium
and the characteristic geometry of the friction
rings reduce the weight of the brake discs, thus
improving the balance of the unsprung masses.
The optional 19-inch ceramic brake* with 6-piston
fixed callipers at the front is available for even
more demanding loads. In this brake system,
the brake discs on the front axle are made of a
carbon-fibre reinforced ceramic material. This is
based on hard and abrasion-proof silicon carbide
with high-strength carbon embedded. This
combination results in an enormous abrasion
resistance which allows extremely high mileages
to be achieved, and at the same time reduces
sensitivity to high thermal loads. In addition, the
material is lighter than steel discs.
Nothing can stop
a top athlete.
Except for a top brake system.
RS4_Avant_Fas18_2013_03.indd 34 30.04.13 12:51