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740
9-1. Specifications
Tire related term
Tread separation
Treadwear indicators
(TWI)
Wheel-holding fixture
*
: Table 1 Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Designated seating
capacity, Number of
occupants
2 through 4
5 through 10
11 through 15
16 through 20
Pulling away of the tread from the tire carcass
The projections within the principal grooves
designed to give a visual indication of the
degrees of wear of the tread
The fixture used to hold the wheel and tire
assembly securely during testing
Vehicle normal load,
Number of occupants
2
3
5
7
Meaning
Occupant distribution
in a normally loaded
vehicle
2 in front
2 in front, 1 in second
seat
2 in front, 1 in second
seat, 1 in third seat, 1
in fourth seat
2 in front, 2 in second
seat, 2 in third seat, 1
in fourth seat
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