Jeep 2010 Grand Cherokee - Owner Manual - Manual (Page 290)

Tire Terminology and Definitions
Term Definition
Accessory Weight This means the combined weight of optional accessories. Some
examples of optional accessories are automatic transmission,
power steering, power brakes, power windows, power seats, and
air conditioning.
Air Pressure The amount of air inside the tire pressing outward on each square
inch of the tire. Air pressure is expressed in pounds per square
inch (psi) or kilopascal (kPa).
Bead The tire bead contains steel wires wrapped by steel cords that
hold the tire onto the rim.
Bias Ply Tire A pneumatic tire in which the plies are laid at alternate angles
less 90 degrees to the centerline of the tread.
Cold Tire Pressure The amount of air pressure in a tire, measured in pounds per
square inch (psi) or kilopascal (kPa) before a tire has built up heat
from driving.
Curb Weight The weight of a motor vehicle with standard and optional equip-
ment including the maximum capacity of fuel, oil, and coolant,
but without passengers and cargo.
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