Tire tread
WARNING
Although the applicable federal motor vehicle
safety laws consider a tire to be worn when
the tread wear indicators (TWI) become
visible at approximately 1/16 in (1.6 mm), we recommend that you do not allow
your tires
to wear down to that level. As tread depth
approaches 1/8 in (3 mm), the adhesion
properties on a wet road are sharply reduced.
Depending upon the weather and/or road
surface (conditions), the tire traction varies
widely.
Do not use tires that are excessively worn as the tire traction on wet road surfaces decreases significantly when the tread depth is less than 1/8 inch (3 mm).
Tread wear indicators (TWI) are required by law. Six indicators are positioned over the tire tread. They are visible as soon as a tread depth of approx. 1/16 inch (1.6 mm) is reached. If this is the case, the tire is so worn that it must be replaced.
The recommended tread depth for summer tires is at least 1/8 inch (3 mm). The recommended tread depth for winter tires is at least 1/6 inch (4 mm).
Bar marking 1 for tread wear is integrated into the tire tread.
See also:
DOT, Tire Identification Number (TIN)
U.S. tire regulations prescribe that every manufacturer of new tires or retreader
has to imprint a TIN in or on the sidewall of each tire produced.
The TIN is a unique identification number. The ...
Safety & Features
As of this writing, neither the National Highway Traffic Safety
Administration nor the Insurance Institute for Highway Safety has tested the
E-Class wagon. (IIHS has tested the E-Class sedan, but ...
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