When snow tires are installed, the regular tread tires
on the rear should be moved to the front and the front
tires stored. When snow tires are removed, install the
stored tires on the rear. Do not rotate studded tires.
Always remount them in their original positions.
When storing tires, lay them flat on a clean, dry oilfree
floor. Keep them away from ozone, which comes
from the electrical sparking frequently produced by electric
motors. Store them in the dark. Direct sunlight is
hard on tires.
Tread Wear Most tires used today have built-in tread
wear indicators to show when they need replacement.
These indicators appear as 1/2-tnch (12-mm) wide
bands when the tire tread depth wears to 1/6 inch (1.5
mm). When the indicators appear in two or more adjacent
grooves at three locations around the tire, or when cord or
fabric is exposed, tire replacement is recommended.
If the tires do not have tread wear indicators, a tread
depth indicator (Figure 42-11) quickly shows in 32nds
of an inch how much tire tread is left. When only 2/32 inch
(1.5 mm) is left, it is time to replace a tire.
When snow tires are installed, the regular tread tires
on the rear should be moved to the front and the front
tires stored. When snow tires are removed, install the
stored tires on the rear. Do not rotate studded tires.
Always remount them in their original positions.
When storing tires, lay them flat on a clean, dry oilfree
floor. Keep them away from ozone, which comes
from the electrical sparking frequently produced by electric
motors. Store them in the dark. Direct sunlight is
hard on tires.
Tread Wear Most tires used today have built-in tread
wear indicators to show when they need replacement.
These indicators appear as 1/2-tnch (12-mm) wide
bands when the tire tread depth wears to 1/6 inch (1.5
mm). When the indicators appear in two or more adjacent
grooves at three locations around the tire, or when cord or
fabric is exposed, tire replacement is recommended.
If the tires do not have tread wear indicators, a tread
depth indicator (Figure 42-11) quickly shows in 32nds
of an inch how much tire tread is left. When only 2/32 inch
(1.5 mm) is left, it is time to replace a tire.
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