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. Ltd. regarding tyre life, effective radius of different sizes, and supply of tyres and wheels.
| Identifier | ExFiles\Box 58\1\ Scan026 | |
| Date | 3rd May 1927 | |
| X5820. DUNLOP RUBBER CO.,LTD. TELEGRAPHIC ADDRESS: "DUNLOPS, BIRMINGHAM" TELEPHONE: BIRMINGHAM CENTRAL 4108 P.B.E. 25 LINES YOUR REF: HS.{Lord Ernest Hives - Chair}Rm{William Robotham - Chief Engineer}2/LG. OUR REF: FF.II.2483. Development Design. FORT DUNLOP ERDINGTON BIRMINGHAM 3rd. May 1927. Messrs. Rolls Royce Ltd. Derby. For the Attention of W.A. Robotham. Esq. Dear Sir, We wish to acknowledge yours of the 28th. ult.on the question of tyre life with small diameter rims. We understand you wish to carry out tests with 6" tyres on 19" diameter rims for your 20 H.P. Car. As requested, we give the effective radius of 6" tyres, fitted to 19" rims, in comparison with the same section fitted to 21" rims. 31 x 6.00 for 19" rims. 14.75 Effective Radius. 33 x 6.00 for 21" " 15.75 " " With regard to the supply of tyres. We are afraid we shall not be in a position to supply you with the sizes you require until approximately the end of this month. In the meantime, our Coventry House are communicating with you on the wheel question, particularly dealing with Artillery Steel Wheels. With regard to wire wheels, which we propose supplying for your test. These should be available during the next two weeks. cont'd.{John DeLooze - Company Secretary} | ||