Oliver Legacy Elite II2017 Owner's Manual page 49

Special Trailer (ST) tire:
The "ST" is an indication the tire is for trailer use only.
Test rim:
The rim on which a tire is fitted for testing, and may be any rim listed as
appropriate for use with that tire.
Tread:
That portion of a tire that comes into contact with the road.
Tread rib:
A tread section running circumferentially around a tire.
Tread separation:
Pulling away of the tread from the tire carcass.
Tread wear indicators (TWI): The projections within the principal grooves
designed to give a visual indication of the degrees of wear of the tread.
Vehicle capacity weight:
The rated cargo and luggage load plus 68 kilograms (150 lbs.) times the
vehicle's designated seating capacity.
Vehicle maximum load on the tire:
The load on an individual tire that is determined by distributing to each axle
its share of the maximum loaded vehicle weight and dividing by two.
Vehicle normal load on the tire:
The load on an individual tire that is determined by distributing to each axle
its share of the curb weight, accessory weight, and normal occupant weight
(distributed in accordance with Table I of CRF 49 571.110) and dividing by
2.
Weather side:
The surface area of the rim not covered by the inflated tire.
40