Interpretation ID: nht78-1.23

DATE: 03/22/78

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

TO: Trailer Manufacturers Association

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your December 22, 1977, letter asking whether the tire information label required by Standard No. 120, Tire Selection and Rims for Motor Vehicles Other Than Passenger Cars, must contain the rim size of the rim that is mounted on the vehicle.

Paragraph S5.3.2. of the standard states that the label must contain "the size designation and, if applicable, the type designation of rims (not necessarily those on the vehicle) appropriate for those tires." This paragraph specifically permits a manufacturer to equip a vehicle with rim sizes that differ from those listed on its tire information label.

SINCERELY,

December 22, 1977

Frank A. Brendt U.S. DEPARTMENT OF TRANSPORTATION

Dear Mr. Brendt:

On the behalf of the members of the Trailer Manufacturers Association, we request an interpretation in the matter following relative to FMVSS No. 120.

S5.1.2 permits the tire size mounted on the vehicle not to be disclosed on the certification label providing the tire mounted falls within GAWR requirements.

Boat trailer manufacturers commonly provide a number of tire options and often these tires have different rims. It is not clear if FMVSS No. 120 requires the rim which is mounted on the trailer to be disclosed on the certification plate. For example, at the customer's wish, a given trailer might be equipped with 12, 13 or 14 inch wheels.

We have sought clarification of this subject from Department of Transportation compliance personnel, but were told that this specific point had not been raised previously, and therefore we would have to seek a formal interpretation which we now do.

Executive Secretary

Donald I. Reed