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).
Tyre mileage, wear, and stock levels during testing.
| Identifier | ExFiles\Box 4\9\ 09-page113 | |
| Date | 26th August 1925 | |
| R.R. 409a (Old) (D.R. 173 25-9-24) J.B.D. EXPERIMENTAL REPORT -2- Expt. No. REF: Chateauroux. 26.8.25. No.31 after 1,588 miles - worn to canvas. No.32 " 1,655 " " " " No.28 " 1,700 " " " " Note - Two different tyres were both numbered 28. ------------------ Tyres still in use on Aug. 25th.1925. No.22 Total mileage to date .... 3,120 No.30 " " " " .... 2,007 No.33 " " " " .... 368 No.34 " " " " .... 1,443 No.35 " " " " .... 1,575 No.36 " " " " .... 1,943 No.37 " " " " .... 1,943 ------------------ Tyres received from all sources ........... 38 Tyres in stock (100% good) .......... 6 } 38 Tyres accounted for in above lists... 32 } AVERAGE LIFE OF TYRES DURING TESTS .... 2,088 MILES. ------------------ INNER TUBES. Total quantity received ............ 38 In stock (100% good).. 11 " " (50% " ) ... 1 Undergoing repairs ...... 6 Requiring repairs ...... 4 Discarded .............. 16 --- 38 --- --- 38 --- ------------------ Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||