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Interpretation ID: 77-4.43

TYPE: INTERPRETATION-NHTSA

DATE: 12/01/77

FROM: AUTHOR UNAVAILABLE; J. J. Levin, Jr.; NHTSA

TO: Nissan Motor Co., Ltd.

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your telephone conversation of November 9, 1977, with Roger Tilton of my staff concerning the applicability of the tire performance standard (Standard No. 109. New Pneumatic Tires -- Passenger Cars) to temporary-use spare tires.

The National Highway Traffic Safety Administration has permitted the manufacture of temporary-use spare tires because they are smaller than regular spare tires and thus when carried in the automobile reduce its overall weight. A reduction in motor vehicle weight can result in increased fuel efficiency of the vehicle. These tires must comply with all of the safety requirements applicable to passenger car tires.