Special Notes About Wheels And Tires; Notes Regarding Tire Replacement - Mazda MX-5 1990 Workshop Manual

WHEELS AND TIRES
Q
WHEELS AND TIRES
SPECIAL NOTES ABOUT WHEELS AND TIRES
1 . Do not use wheels or tires other than the specified types.
2. Aluminum wheels are easily scratched. When washing them, use a soft cloth, never a wire brush. If the
vehicle is steam cleaned, do not allow boiling water to contact the wheels.
3. If alkaline compounds (such as saltwater or road salts) get on aluminum wheels, wash them as soon as
possible to prevent damage. Use only a neutral detergent.
9MUOOX-004
NOTES REGARDING TIRE REPLACEMENT
Note the following points when tires are to be removed from or mounted onto the wheels.
1. 8e careful not to damage the tire bead, the rim bead, or the edge of the rim.
2. Apply a soapy solution to the tire bead and the edge of the rim.
3. Use a wire brush, sandpaper, or cloth to clean and remove all rust and dirt from the rim edge and the
rim bead. For aluminum wheels, use only a cloth for this purpose; never use a wire brush or sandpaper.
4. Remove pebbles, glass, nails, and other foreign items embedded in the tire tread.
5. Be sure the air valve is installed correctly. •
6. After mounting a tire onto a wheel, inflate it to
250-300
kPa
(2.55-3.06
kg/cm
2
,
35.55-42.66
psi). Veri-
fy that the bead is seated correctly onto the rim and that there are no air leaks. Then reduce the pressure
to the specified level.
7. If a tire iron is used to change a tire on an aluminum wheel, be sure to use a piece of rubber between
the iron lever and the wheel to avoid damage to the wheel. Work should be done on a rubber mat, not
on a hard or rough surface.
05UOQX·005
05UOQX·006
WEAR INDICATOR
WEAR INDICATOR
9MUOQX·008
05UOQX·004
INSPECTION I ADJUSTMENT
Check the following and adjust or replace as necessary.
1. Air pressure.
Check the air pressure of all tires, including the spare tire,
with an air pressure gauge.
Air pressure:
Standard tires 177 kPa (1.8 kgflcm
2
,
26
~si)
Temporary spare tires 412 kPa (4.2 kgf/cm
2
,
60 psi)
Caution
• The air pressure must be measured when the tire
is cold.
2. Wheel runout.
Set the probe of a dial indicator against the wheel, and turn
the wheel one full revolution.
Wheel runout: Horizontal 2.0mm (0.079 in) max.
Vertical 1.5mm (0.059 in) max.
3. Tire wear.
Specifications
Remaining tread
Ordinary tires: 1.6mm (0.063 in) min.
(Tire should be replaced if wear indicators are exposed.)
Snow tires: 50% of tread
(Tire should be replaced if wear indicators are exposed.)
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