2012 Toyota Sienna Owners Manual - Page 842

6-1. Specifications Tire related term Reinforced tire Meaning A tire designed to operate at higher loads and at higher inflation pressures than the corresponding standard tire The linear distance between the exteriors of the sidewalls of an inflated tire, excluding elevations due to labeling, decoration, or protective bands That portion of a tire between the tread and bead The parting of the rubber compound from the cord material in the sidewall A tire that attains a traction index equal to or greater than 110, compared to the ASTM E1136 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 ( least one sidewall ) on at Section width Sidewall Sidewall separation Snow tire 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 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 6 Tread Tread rib Tread separation Vehicle specifications 813 SIENNA_U (OM45477U)