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FREON
The refrigerant Freon R12 is used in most BMW automobiles with an air
conditioner up through the 1992
model year. It has a boiling point of - 29.8ºC (sea level), at which the
refrigerant is transformed from a liquid
into a gaseous state. This boiling point, however, is not constant. It is
Principle
Run-flat tires permit continued driving under restricted
conditions even in the event of a complete
tire pressure loss.
General information
The wheels consist of tires that are self-supporting,
to a limited degree, and possibly special
rims.
The reinforcement of the sidewall allows the ti