Interpretation ID: nht80-4.4
DATE: 09/29/80
FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA
TO: Bridgestone Tire Company of America, Inc.
TITLE: FMVSS INTERPRETATION
TEXT: This responds to your July 17, 1980 letter to this office in which you posed six questions concerning Safety Standard 119 (49 CFR @ 571.119). The answers are set forth below following the number you assigned to each question in your letter.
(1) No, T&RA design information is not considered part of the T&RA yearbook for purposes of Standard 119. Design information refers to future tire sizes which will soon be produced, but which are not currently on the market. Since the specifications in the design information have not been formally approved by T&RA, as the yearbook entries have, the design information has not been subjected to the same type of examination by T&RA, and is not accepted by this agency.
(2) The Plunger Energy Table (Table II in Standard 119) published November 13, 1973 is the most current table we have published.
(3) The ETRTO petition to which you refer has not been granted by this agency. Shortly after receipt of the petition, we made a telephone contact with ETRTO requesting further information which would justify setting the plunger energy specifications at the requested levels. ETRTO was informed that the petition would not be considered until we had received this additional information, and no further information has been received. Similarly, your company requested the inclusion of additional values for Table II in a letter dated August 9, 1979. Mr. Finkelstein, our Associate Administrator for Rulemaking, sent a letter to Mr. P. L. Lab of Bridgestone on September 12, 1979 requesting further information and justification for including these values. To date, no further information has been received.
(4) Since there is no plunger energy value specified for tubeless tires with a load range greater than "J" in Table II, there are currently no requirements for plunger energy strength that these tires must meet. It is acceptable if you choose to test these tires at the strength level specified for load range "J" tires, but that level is significantly below what would be expected for higher load range tires.
(5) When your company submits matching information to this agency pursuant to the requirements of S5.1(a) of Standard 119. it is perfectly acceptable to send duplicate copies of the information you have furnished to the dealers, and no separate letter is necessary.
(6) I am aware of only three requests for plunger energy tests for tubeless tires with load ranges greater than "J". The first came from Michelin in 1973, when the Standard was being developed. NHTSA asked Michelin to provide information on the proposed values, and Michelin never raised the issue again. ETRTO submitted the petition you referred to in question 3, and never provided the further information requested. Bridgestone submitted a petition in August 1979 and never provided the further information requested. There have been no other requests for additional plunger energy values.
If you have any further questions concerning this matter, please feel free to contact Mr. Steve Kratzke of my staff at (202)426-2992.
Sincerely,
ATTACH.
BRIDGESTONE TIRE COMPANY OF AMERICA, INC.
July 17, 1980
Ref. No.: HH-80-152
Office of Chief Counsel
National Highway Traffic Safety Administration 400 Seventh Street S.W. Washington, DC 20590
Dear Sir:
We would appreciate your comments on the following questions relative to FMVSS 119.
1) Is TRA Engineering Design Information regarded as a part of the TRA Yearbook from the approval standpoint of FMVSS 119?
2) The latest table of Plunger Energy in FMVSS 119 that we have in our file is as of November 13, 1973. If this is not the latest one available, what is the most current?
3) We understand ETRTO sent a petition to you on November 2, 1977 regarding the Plunger Energy setting of "L" at 21,000 lbs. and "M" at 23,200 lbs. We would like to know if this has been approved by NHTSA.
4) Since the highest load ranges is "J" in our table, we have been testing our 18R22.5 20PR tire at load range "J" for Plunger Energy. We would like to know if this is appropriate.
5) We understand that we are supposed to submit Matching information to you whenever we come up with a new size tire in FMVSS 119. We do distribute this type of information to our dealers and end-users. Is it satisfactory for us to send a copy of this Matching information to you or should we submit a letter to you for this purpose?
6) We believe that we are not the only one with these questions and we wonder if a similar petition has been submitted from other associations or manufacturers.
Thank you in advance for your time in answering the above questions. We will be looking forward to your reply.
Very truly yours,
Hiromi Hamaya -- Vice President, Engineering Dept.