Interpretation ID: nht69-1.29

DATE: 03/14/69

FROM: AUTHOR UNAVAILABLE; C. A. Baker; NHTSA

TO: The Society of Motor Manufacturers and Traders Limited

TITLE: FMVSS INTERPRETATION

TEXT: Thank you for your letter of January 9, 1969, to the Federal Highway Administrator concerning your 1963 Edition of the S.M.M.T. Tyre and Wheel Engineering Manual.

Federal Motor Vehicle Safety Standard No. 109, within Section S3, lists the "Tyre and Wheel Engineering Data Book dated 1965/1966 of the Society of Motor Manufacturers and Traders Limited (S.M.M.T.)" as one of the references containing acceptable test rims. When Standards No. 109 and No. 110 were developed, the National Highway Safety Bureau accepted the S.M.M.T. 1965/1966 Data Book tire and rim combinations based on established usage. We did not, nor do we at present intend to accept general updating of these referenced publications, either foreign or domestic, as valid reasons for answering Standard No. 109 and No. 110. Consequently, any new tire size designations or alternative rim sizes that you wish to list within Standards No. 109 or No. 110 will have to comply, on an individual basis, with the abbreviated guidelines as outlined in the October 5, 1968 Federal Register.