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 inner tube stock levels during tests.
| Identifier | ExFiles\Box 58\1\ Scan006 | |
| Date | 26th August 1925 | |
| R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. 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 " " " " ..... 2,807 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 receives ............. 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. | ||