Toyota Sienna 2021, Manual, Page: 536 / 600

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8-1. Specifications
Pneumatic tire
A mechanical device made of rubber, chemi-
cals, fabric and steel or other materials, that,
when mounted on an automotive wheel, pro-
vides the traction and contains the gas or fluid
that sustains the load
Radial ply tire
A pneumatic tire in which the ply cords that
extend to the beads are laid at substantially 90
degrees to the centerline of the tread
Reinforced tire
A tire designed to operate at higher loads and at
higher inflation pressures than the correspond-
ing standard tire
Section width
The linear distance between the exteriors of the
sidewalls of an inflated tire, excluding elevations
due to labeling, decoration, or protective bands
Sidewall
That portion of a tire between the tread and
bead
Sidewall separation
The parting of the rubber compound from the
cord material in the sidewall
Snow tire
A tire that attains a traction index equal to or
greater than 110, compared to the ASTM E-
1136 Standard Reference Test Tire, when using
the snow traction test as described in ASTM F-
1805-00, Standard Test Method for Single
Wheel Driving Traction in a Straight Line on
Snow-and Ice-Covered Surfaces, and which is
marked with an Alpine Symbol (
) on at least
one sidewall
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
Tire related term Meaning