Lexus GS 450h 2008 Owner's Manual page 570

6-1. Specifications
Tire related term
Test rim
Tread
Tread rib
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
568
The rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
That portion of a tire that comes into contact with the
road
A tread section running circumferentially around a
tire
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