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6-1. Specifications
6
Vehicle specifications
*: Table 1 Occupant loading and distribution for vehicle normal load for various
designated seating capacities
Tire related term Meaning
Snow tire
A tire that attains a traction index equal to or greater
than 110, compared to the ASTM E-1136 Standard
Reference Test Tire, when using the snow traction test
as described in ASTM F-1805-00, Standard Test
Method for Single Wheel Driving Traction in a
Straight Line on Snow-and Ice-Covered Surfaces, and
which is marked with an Alpine Symbol ( ) on at
least one sidewall
Tes t r i m
The rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
Tre a d
That portion of a tire that comes into contact with the
road
Tre a d r i b A tread section running circumferentially around a tire
Tread separation Pulling away of the tread from the tire carcass
Treadwear indicators
(TWI)
The projections within the principal grooves designed
to give a visual indication of the degrees of wear of the
tread
Wheel-holding fixture
The fixture used to hold the wheel and tire assembly
securely during testing
Designated seating capac-
ity, Number of occupants
Vehicle normal load,
Number of occupants
Occupant distribution in a
normally loaded vehicle
2 through 4 2 2 in front
5 through 10 3 2 in front, 1 in second seat
11 through 15 5
2 in front, 1 in second seat,
1 in third seat,
1 in fourth seat
16 through 20 7
2 in front, 2 in second
seat, 2 in third seat,
1 in fourth seat
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