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182 STARTING AND OPERATING
Treadwear indicators (TWI) are required by law. These
indicators are located in six places on the tread
circumference and become visible at a tread depth of
approximately 1/16 in (1.6 mm), at which point the tire
is considered worn and should be replaced.
Recommended minimum tire tread depth:
• Summer tires 1/8 in (3 mm)
• Winter tires 1/6 in (4 mm)
Storing Tires
Cleaning Tires
Direction of Rotation
An arrow on the sidewall indicates the intended
direction of rotation (spinning) of the tire which
means, the wheel must mounted in the direction of
rotation.
WARNING!
Although the applicable federal motor vehicle
safety laws consider a tire to be worn when the
treadwear indicators (TWI) become visible at ap-
proximately 1/16 in (1.6 mm), do not allow your
tires to wear down to that level. As tread depth ap-
proaches 1/8 in (3 mm) for summer tires or 1/6 in 4
mm) for winter tires, the adhesion properties on a
wet road are sharply reduced.
Depending upon the weather and/or road surface
conditions), the tire traction varies widely.
WARNING!
Keep unmounted tires in a cool, dry place with as
little exposure to light as possible. Protect tires
from contact with oil, grease and diesel fuel.
WARNING!
Never use a round nozzle to power wash tires. The
intense jet of water can result in damage to the
tire.
Always replace a damaged tire.