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Intended outboard sidewall
The sidewall that contains a white-wall, bears white lettering or bears manufacturer, brand, and/or model name
molding that is higher or deeper than the same molding on the other sidewall of the tire or the outward facing
sidewall of an asymmetrical tire that has a particular side that must always face outward when mounted on a
vehicle.
Light truck (LT) tire
A tire designated by its manufacturer as primarily intended for use on lightweight trucks or multipurpose
passenger vehicles.
Load rating
The maximum load that a tire is rated to carry for a given inflation pressure.
Maximum load rating
The load rating for a tire at the maximum permissible inflation pressure for that tire.
Maximum permissible inflation pressure
The maximum cold inflation pressure to which a tire may be inflated.
Maximum loaded vehicle weight
The sum of curb weight, accessory weight, vehicle capacity weight, and production options weight.
Measuring rim
The rim on which a tire is fitted for physical dimension requirements.
Pin Weight
The downward force applied to the 5
th
wheel or gooseneck ball, by the trailer kingpin or gooseneck coupler.
Non-pneumatic rim
A mechanical device which, when a non-pneumatic tire assembly incorporates a wheel, supports the tire, and
attaches, either integrally or separably, to the wheel center member and upon which the tire is attached.
Non-pneumatic spare tire assembly
A non-pneumatic tire assembly intended for temporary use in place of one of the pneumatic tires and rims that
are fitted to a passenger car in compliance with the requirements of this standard.
Non-pneumatic tire
A mechanical device which transmits, either directly or through a wheel or wheel center member, the vertical
load and tractive forces from the roadway to the vehicle, generates the tractive forces that provide the
directional control of the vehicle and does not rely on the containment of any gas or fluid for providing those
functions.
Non-pneumatic tire assembly
A non-pneumatic tire, alone or in combination with a wheel or wheel center member, which can be mounted on
a vehicle.
Normal occupant weight
This means 68 kilograms (150 lbs.) times the number of occupants specified in the second column of Table I
of 49 CFR 571.110.
Occupant distribution
The distribution of occupants in a vehicle as specified in the third column of Table I of 49 CFR 571.110.
Open splice
Any parting at any junction of tread, sidewall, or innerliner that extends to cord material.
Outer diameter
The overall diameter of an inflated new tire.
Overall width
Tire Safety Information
