Interpretation ID: 77-1.37

TYPE: INTERPRETATION-NHTSA

DATE: 03/04/77

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: Jack Gromer -- Vice President, Timpte

TITLE: FMVSS INTERPRETATION

TEXT: This responds to Timpte's January 11, 1977, question whether NHTSA regulations prohibit sale and delivery of a trailer to the first purchaser equipped with two used tires in place of the eight tires that are specified for the vehicle and which would form the basis of certification under Part 567, Certification and the basis of compliance with Standard No. 120, Tire Selection and Rims for Vehicles Other Than Passenger Cars.

As you are aware, Part 567 of regulations requires a statement by the vehicle manufacturer of the gross axle weight rating (GAWR) for each axle on any motor vehicle it manufactures (@ 567.4(g)(4)). The term "GAWR" is defined in @ 571.3 of our regulations as the value specified by the manufacturer as the load-carrying capacity of the axle system, measured at the tire-ground interfaces. This clearly means that the tires and wheels on an axle must be taken into account in assigning a GAWR value for certification purposes.

Standard No. 120 specifies that "each vehicle . . . shall be equipped with tires that meet [specified requirements]" (S5.1.1) but makes provision for the installation of used tires owned by the purchaser if the maximum load ratings of the tires on an axle system are at least equal to the GAWR assigned to the axle system by the vehicle manufacturer (S5.1.3). Section S5.1.3 reflects the agency's view that existing commercial practices for the delivery of vehicles with safe used tires has not created a significant safety problem to date.

In recognition of varying commercial practices for the delivery of vehicles, the agency has interpreted S5.1.1 of Standard No. 120 to prohibit the installation of tires that do not meet certain performance requirements, but not as a requirement that tires be fitted to every axle of a vehicle prior to certification and sale. A copy of this interpretation is enclosed for your information. The interpretation makes clear that, while the agency interprets Standard No. 120 (and by implication Part 567) to permit the assignment of a GAWR on the basis of tires listed on the certification plate, the assignment of an arbitrarily high (or low) GAWR for purposes such as avoiding a Federal motor vehicle safety standard could constitute a violation of law.

With regard to the practice you describe of delivering an empty new trailer to the purchaser on fewer tires that necessary to conform to the GAWR listed on the certification plate and the minimum requirements of S5.1.1 and S5.1.2 of Standard No. 120, the agency interprets its motor vehicle safety standard and @ 567.4(g)(4) to permit such a good faith delivery practice. In the event any pattern of avoidance of Federal requirements becomes apparent, however, the agency would reconsider this interpretation.

SINCERELY, TIMPTE, INC.

JANUARY 11, 1977

NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION OFFICE OF COMPLIANCE

AS MANUFACTURERS OF SEMI-TRAILERS, WE ARE CERTIFYING VIRTUALLY 100% OF OUR PRODUCTION TO ALL APPLICABLE STANDARDS CURRENTLY IN EFFECT. ONE PROBLEM DEVELOPS OCCASIONALLY AND WE WOULD LIKE TO HAVE AN INTERPRETATION ON THIS MATTER.

THE CONDITION IS ONE WHERE WE HAVE BUILT A SEMI-TRAILER FOR A PARTICULAR CUSTOMER AND THAT CUSTOMER CHOOSES TO FURNISH THE TIRES. IN OUR MANUFACTURE, WE WILL SPECIFY THE AXLE SUSPENSION AND OTHER COMPONENTS AS WELL AS INDICATING THE TIRE SIZE WHICH THE CUSTOMER WILL FURNISH. OCCASIONALLY, THE NEW TIRES ARE NOT SENT TO OUR MANUFACTURING FACILITY HERE, BUT RATHER, TIRES ARE INSTALLED BY THE CUSTOMER AT THE TIME HE TAKES THE TRAILER TO HIS OWN FACILITY. PICK UP OF THE TRAILER IS ACCOMPLISHED BY A DRIVER WITH A TRUCK TRACTOR BELONGING TO THE CUSTOMER AND HE MAY BRING WITH HIM ONLY TWO WHEELS AND TIRES WHICH ARE ON THE "RUN OUT" VARIETY. THEY REQUEST US TO INSTALL THESE ON THE VEHICLE AND CHAIN UP THE REAR AXLE OF THE TANDEM SO THAT THE DRIVER CAN THEN TAKE THE NEW TRAILER EQUIPPED WITH ONLY TWO WHEELS AND TIRES IN LIEU OF EIGHT BACK TO HIS FACILITY. NOW, OUR CERTIFICATION WOULD NORMALLY BE FOR THE FULL COMPLEMENT OF TIRES AND THE GAWR RATINGS AS WELL AS THE GVWR RATINGS WOULD BE STAMPED ON THE CERTIFICATION LABEL AS IF THE TRAILER WERE EQUIPPED WITH THE INTENDED RUBBER.

BY COMPLYING WITH THE CUSTOMER'S REQUEST AND INSTALLING OLD TIRES AID FEWER TIRES THAN INTENDED FOR THE TRAILER AND ALLOWING HIM TO TAKE DELIVERY FROM OUR PREMISES, ARE WE MAKING OURSELVES LIBEL IN ANY WAY FOR NON-COMPLIANCE WITH THE CERTIFICATION REGULATIONS OR WHATEVER? UNDERSTAND PLEASE, THAT THIS WOULD BE DONE AT CUSTOMER REQUEST AND INSTRUCTION WITH HIS FULL INTENTION BEING TO EQUIP THE TRAILER WITH A FULL SET OF GOOD TIRES, POSSIBLY RECAPS, AT THE TIME THAT HE GETS IT TO HIS FACILITY.

CERTAINLY, WE DON'T WANT TO PUT OURSELVES IN A COMPROMISING POSITION AND IT WOULD NOT BE OUR INTENT TO DEVIATE OR BE IN NON-COMPLIANCE WITH ANY OF THE NHTSA REGULATIONS; AT THE SAME TIME WE WOULD LIKE TO ACCOMODATE OUR CUSTOMERS SO WE WOULD APPRECIATE AN OPINION FROM YOU REGARDING THIS TYPE OF CONDITION. IT IS AN INFREQUENT ONE; HOWEVER, WE HAVE BEEN CONFRONTED WITH THIS TYPE OF REQUEST.

JACK GROMER VICE PRESIDENT - ENGINEERING