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 India Tyre & Rubber Company Ltd. comparing the specifications of a new tyre design against the present design.
| Identifier | ExFiles\Box 29\4\ Scan236 | |
| Date | 6th December 1934 | |
| TELEPHONES: PAISLEY 4141/5. INDIA TYRE & RUBBER COMPANY LTD. INCHINNAN SCOTLAND TELEGRAMS: INDIAOWL, RENFREW. OUR REF. PW/HDE. YOUR REF. 6th December, 1934. W. A.{Mr Adams} Robotham, Esq., Rolls-Royce Ltd., DERBY. Dear Mr. Robotham, We are today despatching 15 India Speed Special Covers in the design similar to that which we showed you on our visit to Derby. These have been directed to:- C. W. Hancock Esq., Hotel de France, Chateauroux, Indre, FRANCE. The tread has been made slightly wider, flatter and thicker with a view to improving the general performance of the tyre. We think that the Nonskid properties will be slightly better than the present design which you are now using and that the wearing qualities will be superior to our present tyre. The attached Road Contact Prints which we have made might be of interest to you. The comparative figures on the two designs are as follows:- Present Design. New Design. Total Area. 26.00 sq. in. 28.10 sq. in. Groove " 8.58 " " 7.82 " " Solid " 17.42 " " 20.28 " " N.S. Edge. 7 7/8 inches. 7 3/4 inches. - Contd. - | ||