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 to The India Tyre & Rubber Co. regarding testing 4-ply tyres and light alloy wheels on a Bentley to save weight.
| Identifier | ExFiles\Box 30\5\ Scan052 | |
| Date | 25th March 1935 | |
| +4462 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} &/KW. 25th March, 1935. The Earl of Rothes, The India Tyre & Rubber Co.Ltd., Mileage Dept. (Area 'B'), 80, Clapham Road, London, S.W.9. Dear Rothes, Many thanks for your letter of the 21st March. When we try out the small wheels on the Bentley we shall run the 4-ply tyres because if we cannot save weight our interest in these wheels is considerably reduced. We should like to know how much the effective life of the tyre is reduced by running 4-ply tyres, i.e., if the case does not burst, is the effective depth of tread much less than the 6-ply tyre ? With regard to the wheel, we are experimenting with light alloy rims with a view to reducing the weight of these. Yours sincerely, | ||