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 from Dunlop Rubber Co. detailing the transition from non-standard to British Standard light car tyre sizes for the 1922 season.
| Identifier | ExFiles\Box 45\1\ Scan248 | |
| Date | 13th January 1922 guessed | |
| - 3 - In the matter of Light Car Tyres, the following have been the principal sizes in use, and against these we give the nearest equivalent British Standard sizes:- If present equipment For future equipment (non-standard sizes). (British Standard sizes. 700x80 m/m on Rim 650x65 26x3" (700x80) on Rim 26x3" 750x80 m/m " 700x65 28x3" " 28x3" 710x90 m/m " 710x90 28x3½" " 28x3½" 760x90 m/m " 760x90 30x3½" " 30x3½" Although we shall continue to manufacture non-standard sizes as long as may be necessary for replacement purposes, we feel sure you will agree that it is undesirable to perpetuate the same by continuing to fit these types as original equipment, and therefore trust you will see your way to adopt British Standard sizes for your new season's models. Wheels & Rims. In the matter of wheels and rims for Beaded Edge or Straight Side Tyres; we shall be happy to quote for your requirements and we enclose herewith a further copy of our revised wheel and rim price list. Our new season's terms have already been quoted you and these embody very substantial price reductions. We therefore trust that you will favour us by making Dunlop tyres your Standard tyre equipment for Season 1922. We shall be pleased to give you any further information that you may require. Yours faithfully, THE DUNLOP RUBBER CO., LTD. Enclos. | ||