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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter concerning the probable adoption of new large section tire and wheel sizes, and the discarding of old sizes.

Identifier  ExFiles\Box 53\2\  Scan293
Date  15th November 1926
  
Oy3-E-111526

November 15, 1926.

Mr. Basil Johnson,
Rolls-Royce, Ltd.,
London, England.

(Copy for the attention of Mr.Royce
" " " " " Mr.Bailey
" " " " " Mr.Hives)

Dear Sir:
Re Tires

We attach a copy of letter re the probable adoption in this country of large section tires for 18" and 20" wheels.

New sizes would be:-

6.75 tire
18" wheel - 30" x 6.75"
20" " - 32" x 6.75"

6.00 tire
18" wheel - 30" x 6.00"
20" " - 32" x 6.00"

5.25 tire
18" wheel - 28" x 5.25"
20" " - 30" x 5.25"

The sizes probably discarded will be:-

7.30 tire
20" wheel - 34" x 7.30"

6.20 tire
20" wheel - 32" x 6.20"

5.77 tire
20" wheel - 30" x 5.77"

Yours very truly,
Maurice Olley

MO/E
  
  


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