Interpretation ID: 86-3.20

TYPE: INTERPRETATION-NHTSA

DATE: 05/08/86

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: Thomas T. Griffing

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. Thomas T. Griffing Manager, Technical Services Yokohama Tire Corporation 1530 Church Road Montebello, CA 90640

Dear Mr. Griffing:

This responds to your letter to Mr. Glen Ludwig, of our Enforcement division, seeking an interpretation of Standard No. 119, New Pneumatic Tires for Motor Vehicles Other Than passenger Cars (49 CFR S571.119). Specifically, you stated that your company would like to label the following information on medium truck tires, in addition to the information specifically required to appear on the tires by Standard No. 119:

1. the load index specified by the International Standards Organization (ISO): and

2. the speed rating specified by the European Tire and Rim Technical Organisation (ETRTO).

You asked two questions concerning these markings. First, you asked whether Standard No. 119 allows tire manufacturers to place two different load plates on tires, one for Standard No. 119 and one with the ISO load index, even if the maximum load given in pounds is not exactly the kilogram value for the maximum load of the listed ISO load index. The answer to this question depends on whether the ISO load index information is presented in a manner that would obscure or confuse the meaning of the information required to appear on the sidewall of the tire by Standard No. 119, or otherwise defeat the purpose of the required information.

Paragraph S6.5 of Standard No. 119 requires that certain information be labeled on the sidewalls of each tire subject to this standard. The agency has frequently stated in past interpretations that the purpose of these labeling requirements is to provide the consumer, in a clear and straightforward manner, with technical information necessary for the safe use of the tires. See, for example, the enclosed April 30, 1980 letter to Mr. Arnold van Ruitenbeek. Standard No. 119 permits tire manufacturers to label additional information on the sidewall of the tires, provided that the additional information does not obscure or confuse the meaning of the required information, or otherwise defeat its purpose.

It is not clear from your letter whether you are proposing to add just the ISO load index to the required information on the sidewall of the tires, or that load index and a separate maximum load rating expressed in kilograms. If you are proposing the former course of action, Standard No. 119 does not prohibit tire manufacturers from adding the ISO load index to the information required by Standard No. 119 to appear on the sidewall of the tires, provided that the load index is shown in such a was that it is not confusing to consumers. This agency sent two letters to Michelin Tire Corporation on this subject, dated July 14, 1980 and August 28, 1980. I have enclosed copies of these letters for your information.

If, on the other hand, you are proposing the latter course of action, NHTSA has said that the load and inflation pressure information can be expressed in both English units and metric units, provided that the metric units are equivalent to the English units. See the enclosed April 5, 1979 letter to Mr. Michael Petler. However, Standard No. 119 does not permit a tire manufacturer to list two different maximum load values on its tires. See the enclosed August 18, 1983 letter to Mr. Arnold van Ruitenbeek. Accordingly, if your company's tires were to List one value as the maximum load rating in pounds and a different value as the maximum load rating in kilograms, NHTSA would consider such labeling to be a violation of the requirement in S6.5(d) that tires be labeled with "the maximum load rating". Two different maximum load ratings on the same tire could confuse consumers, and give rise to questions about which of the two loads is really "the maximum load" the tire can carry. Such confusion would frustrate the purpose of the labeling requirement in Standard No. 119. Accordingly, such labeling would violate the requirement of S6.5(d) of the Standard.

Your second question was whether this Department put out any special instructions for tire manufacturers regarding the placement on the tire of the ETRTO and ISO information. As explained above, Standard No. 119 prohibits the addition of information to tire sidewalls only if such information confuses or obscures the meaning of the required information, or otherwise defeats the purpose of the required information. There are no further "special instructions" concerning this requirement. In past agency interpretations, the agency has made clear that the ETRTO speed ratings and the ISO load indices may be included in a tire's size designation without violating this prohibition. See the enclosed June 25, 1981 letter to Mr. Keigo Ohgiya for the ETRTO speed ratings and the August 28, 1980 letter to Mr. John B. White for the ISO load indices.

This agency position leaves wide latitude for the tire manufacturers to incorporate such additional information onto the tire sidewalls. One of the reasons for allowing this wide latitude is this agency's hope that the tire manufacturers can collectively agree, through the standardization organizations, to a resolution of the potential problems associated with providing additional information. If the tire companies jointly agree on a method of presenting this information that is not confusing to consumers, no "special instructions" or other actions by this agency would be needed.

Should you have any further questions or need more information on this subject, please contact Steve Kratzke of my staff at this address or by telephone at (202) 426-2992.

Sincerely,

Erika Z. Jones Chief Counsel

Enclosures

February 5, 1986

U.S. Department of Transportation National Highway Traffic Safety Administration Washington D.C. 20590 ATTENTION: Mr. Glen Ludwig

Dear Mr. Ludwig:

Yokohama has been requested by our European Subsidiary Company to install the required load index and speed symbols specified by ETRTO and ISO standards on our medium truck all steel tires for shipment and distribution there. Considering this request, Yokohama recognizes that in addition to the load and inflation markings mandated by FMVSS 119 regulation, a separate plate 'ill have to be installed for the aforementioned ETRTO/ISO markings since carrying capacities and some other information are dissimilar based upon two separate standards. This situation has prompted us to contact you in attempt to clarify the situation and insure we are in compliance with the U.S. Federal regulations.

Accordingly, would you please respond to our questions below concerning these markings:

1. If Yokohama places 2 different load plates on the tire, one for DOT 119 and a separate load index for ETRTO/ISO, is this compatible with the FMVSS 119 regulations even though the load in pounds is not exactly the kilogram value of the load index?

2. Is there any specific instructions put forth by the Department of Transportation to the placement on the tire of the additional ETRTO/ISO information?

In addition to your specific answers to these questions would you please comment upon any other information which you feel pertinent to these tire markings as it applies to Federal FMVSS 119 compliance.

Thank you for you assistance and cooperation.

Thomas T. Griffing Manager Technical Services

TTG:lea