Interpretation ID: aiam0144
Chief Engineer
The Society of Motor Manufacturers and Traders Limited
Forbes House
Halkin Street
London SWI;
Dear Mr. Woodbridge: Thank you for your letter of January 9, 1969, to the Federal Highwa Administrator concerning your 1968 Edition of the S.M.M.T. Tyre and Wheel Engineering Manual.; Federal Motor Vehicle Safety Standard No. 109, within Section S3, list 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 rims 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 amending 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*.; Sincerely, Charles A. Baker, Office of Standards on Accident Avoidance Motor Vehicle Safety Performance Service;