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527 8-1. Specifications 8 Vehicle specificatio ns * : Table 1 -Occupant loading and distribution for vehicle normal load for var- ious designated seating capacities Test rim The rim on which a tire is fitted for testing, Tread That portion of a tire that comes into con- Tread rib A tread section running circumferentially Tread separation Pulling away of the tread from the tire car- Treadwear indicators (TWI) The projections within the principal Wheel-holding fixture The fixture used to hold the wheel and tire Tire related term Meaning Designated seating capacity, Number of occupants Vehicle normal load, Number of occupants Occupant distribution in a normally loaded vehi- cle 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 |