New And Retreaded Tyres; Interchanging Wheels - BMW 840Ci Owner's Handbook Manual

New tyres
132
To maintain the car's good road
behaviour, always fit tyres of the same
make and tread pattern to all wheels.
a
Do not use retreaded tyres on
this car, as they could impair its road
behaviour and safety. Their carcases
may differ in internal construction or
have aged sufficiently to cast doubt
on their durability.c
Interchanging wheels and tyres
Tread wear patterns vary between the
front and rear wheels, according to
the individual conditions in which the
car is operated. In the interests of
safety and the best possible vehicle
behaviour, you are recommended not
to adopt the practice of interchanging
the wheels.
If you wish to interchange the wheels
for reasons of operating cost, remem-
ber that the expense incurred in inter-
changing the wheels also has to be
taken into account when assessing
whether it is worth trying to extend the
tyres' operating life in this way. BMW
Service can advise you.
If you do decide to interchange the
wheels, please take the following pre-
cautions:
Interchange the wheels on the same
side of the car only (though the spare
wheel can be included if desired).
Remember that braking efficiency and
tyre grip may be adversely affected.
If tyres are interchanged in this way,
the process should take place at fre-
quent intervals (max. 5000km/3000
miles).
Always check tyre pressures after fit-
ting, and adjust as necessary.
Spare tyres more than 6 years old
should be reserved for genuine emer-
gencies, that is to say if the car's
mobility cannot otherwise be main-
tained. New tyres should be fitted in
their place as soon as possible, and
they should no longer be brought into
regular service when new tyres are fit-
ted.
A tyre's date of manufacture is shown
as part of the inscription on the tyre
wall:
DOT ... 413 means for instance the
41st week of 1993
Online Edition for Part-No. 01 41 9 790 191 - © 12/98 BMW AG