Interpretation ID: 1984-3.34

TYPE: INTERPRETATION-NHTSA

DATE: 10/31/84

FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHSTA

TO: Yea-tung Hung, Esq.

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your recent letter to this office, asking for information on the necessary steps for certifying that a rim complies with applicable Federal Motor Vehicle Safety Standards. You were particularly interested in how to obtain "authorization" to place the required markings on rims. Markings are only required by Standard No. 120 to appear on rims for use on motor vehicles other than passenger cars. However, to be certain that I answer your request fully, I will explain our requirements for both passenger car rims and rims for use on other motor vehicles.

The two applicable standards are No. 110, Tire Selection and Rims -- Passenger Cars (49 CFR @ 571.110), and No. 120, Tire Selection and Rims for Motor Vehicles Other Than Passenger Cars (49 CFR @ 571.120). I have enclosed copies of both these standards for your information. For passenger car rims, section S4.4 of Standard No. 110 specifies two requirements. First, the rim must be constructed to the dimensions of one of the rims that is listed under the definition of a test rim in Standard No. 109. This means that the rim must comply with the dimensional requirements shown for that rim size in the current publications of specified standardization organizations, such as the Tire and Rim Association, the European Tyre and Rim Technical Organisation, or the Japan Automobile Tire Manufacturers Association. Second, in the event of a rapid loss of inflation pressure with the vehicle traveling in a straight line at 60 miles per hour, the rim must retain the deflated tire until the vehicle can be stopped with a controlled braking application. No markings are required on rims subject to Standard No. 110.

For rims for use on motor vehicles other than passenger cars, Standard No. 120 also specifies two requirements. The first requirement, set forth in section S5.1.1, is that the rims on a vehicle must correspond with the size tire on the vehicle, i.e., be listed as suitable for use with that tire size by the tire manufacturer, pursuant to either Standard No. 109 or No. 119. This would be done in the publications of the standardization organizations, as explained above. This requirement is the responsibility of the vehicle manufacturer, not the rim manufacturer, since only the vehicle manufacturer knows what size tires will actually be mounted on the rim.

The second requirement, set forth in S5.2, is that the rim be marked with five specified items of information. These are:

(1) A specified designation indicating the source of the rim's published nominal dimensions;

(2) The rim size designation and, in the case of multipiece rims, the rim type designation;

(3) The symbol DOT, which constitutes a certification by the rim manufacturer that the rim complies with the applicable requirements of the safety standards;

(4) A designation identifying the rim manufacturer by name, trademark, or symbol; and

(5) The month and year in which the rim was manufactured.

You specifically asked how to obtain "authorization from D.O.T." to engrave the symbol on the rim which indicates that it complies with the standards and regulations. As explained in Standard No. 120, this symbol is the letters "DOT". The United States does not use a certification process similar to the European countries, in which the manufacturer delivers the rims to be certified to the governmental entity, and that entity tests the rims to determine if it can be certified as complying with the applicable standards. Instead, in the United States, the individual manufacturer must certify that its rims comply with all applicable standards. Once the manufacturer determines that its rims do meet the requirements of Standard No. 120, it stamps the symbol "DOT" into those rims, without any authorization from this agency.

Should you have any further questions regarding the requirements applicable to rims, please feel free to contact me.

ENCLS.

OCC-1208

September 18, 1984

U.S. Department of Transportation Office of Chief Counsel NHTSA

Dear Sir,

This is to inquire that how to obtain the authorization from D.O.T. to engrave the symbol or words on the rim which shall indicate the quality of the rim is manufactured in accordance with the regulation set forth by the D.O.T.

On behalf of Shinn Fu Company of Taiwan, I have discussed this matter with Mr. Casanova and was told that there is not necessary to get special authorization for the rim except for the tire.

Please confirm this advice or advise us otherwise.

I am looking forward to hearing from you as soon as possible.

Yea-tung Hong

cc: SHINN FU CO.