Mazda Mazda3 2019 Owner's Manual page 442

Maintenance and Care
Owner Maintenance
If a tyre wears evenly, a wear indicator
will appear as a solid band across the
tread.
Replace the tyre when this happens.
1. New tread
2. Worn tread
3. Tread wear indicator
You should replace the tyre before the
band crosses the entire tread.
▼ Temporary Spare Tyre
Inspect the temporary spare tyre at least
monthly to make sure it is properly
inflated and stored.
NOTE
The temporary spare tyre condition
gradually deteriorates even if it has not
been used.
The temporary spare tyre is easier to
handle because of its construction which is
lighter and smaller than a conventional
tyre. This tyre should be used only for an
emergency and only for a short distance.
Use the temporary spare tyre only until the
conventional tyre is repaired, which
should be as soon as possible.
Refer to Tyre on page 9-6.
6-30
CAUTION
Do not use your temporary spare tyre rim
with a snow tyre or a conventional tyre.
Neither will properly fit and could
damage both tyre and rim.
The temporary spare tyre has a tread life
of less than 5,000 km (3,000 miles). The
tread life may be shorter depending on
driving conditions.
The temporary spare tyre is for limited
use, however, if the tread wear
solid-band indicator appears, replace the
tyre with the same type of temporary
spare (page 6-29).
▼ Replacing a Wheel
WARNING
Always use wheels of the correct size on
your vehicle:
Using a wrong-sized wheel is dangerous.
Braking and handling could be affected,
leading to loss of control and an accident.
CAUTION
A wrong-sized wheel may adversely affect:
Tyre fit
Wheel and bearing life
Ground clearance
Snow-chain clearance
Speedometer calibration
Headlight aim
Bumper height
Tyre Pressure Monitoring System