BYD M6 Owner's Manual page 204

braking will cause unusual tire wear.
When storing a used radial ply tire,
snow tire or rubber studded tire, mark
its direction of rotation so that you can
reuse it with the same rotation
direction in the future. Tires must be
stored in a dry and cool place.
CAUTION
The spare tire isn't included in
the rotation. It is intended only
for short trips.
Part Maintenance 7-14
BYD M6 AUTO Owner's Manual
Inspection and Replacement
of Tires
Tread wear indicator
Check Tires
Check the tread wear indicators on a
tire. If the tread wear indicators are
visible, the tire must be replaced.
Tread wear indicators are built into
each tire. If these indicators appear,
replace the tire. These indicators
appear when your tires have only 1/16
inch (1.6 mm) or less of tread
remaining. If the wear indicators
appear in two or more adjacent
grooves, the tire must be replaced.
The thinner tread, the greater the
possibility of tire skidding is.
If you can see cut, crack, cord fabric,
bulge or any other damage in a tire, it
must be replaced.
If the tire loses air quickly or has any
damage that cannot be repaired well
because of the size or location of the
damage, it must be replaced. If you
have any doubts, contact a BYD
authorized service station.
If air leakage occurs in the tire while
driving, stop driving immediately.
Even a short travel may cause
irreparable damage to the tire.
A tire must be replaced after 6 years
due to aging even if there is no
apparent damage.
Tires deteriorate over time, even if
they are not used or driven on.
The six-year rule also applies to the
spare tire and tires in storage.