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Weather side
The surface area of the rim not covered by the inated tire.
Wheel center member
In the case of a non-pneumatic tire assembly incorporating a wheel, a
mechanical device which attaches, either integrally or separably, to the
non-pneumatic rim and provides the connection between the non-pneu-
matic rim and the vehicle; or, in the case of a non-pneumatic tire as-
sembly not incorporating a wheel, a mechanical device which attaches,
either integrally or separably, to the non-pneumatic tire and provides the
connection between tire and the vehicle.
Wheel-holding xture
The xture used to hold the wheel and tire assembly securely during testing.
1.4. TIRE SAFETY - EVERYTHING RIDES ON IT
The National Trac Safety Administration (NHTSA) has published a
brochure (DOT HS 809 361) that discusses all aspects of Tire Safety,
as required by CFR 575.6. This brochure is reproduced in part below. It
can be obtained and downloaded from NHTSA, free of charge, from the
following web site:
http://www.nhtsa.dot.gov/cars/rules/TireSafety/ridesonit/tires_index.html
Studies of tire safety show that maintaining proper tire pressure, observ-
ing tire and vehicle load limits (not carrying more weight in your vehicle
than your tires or vehicle can safely handle), avoiding road hazards, and
inspecting tires for cuts, slashes, and other irregularities are the most
important things you can do to avoid tire failure, such as tread separa-
tion or blowout and at tires. These actions, along with other care and
maintenance activities, can also:
• Improve vehicle handling
• Help protect you and others from avoidable breakdowns and accidents
• Improve fuel economy
• Increase the life of your tires.
This booklet presents a comprehensive overview of tire safety, including
information on the following topics:
• Basic tire maintenance
• Uniform Tire Quality Grading System
• Fundamental characteristics of tires
• Tire safety tips.
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