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).
Expressing caution about standardizing 20-inch wheels with 7-inch tyres until satisfactory tests are completed.
| Identifier | ExFiles\Box 17\7\ Scan043 | |
| Date | 12th July 1929 | |
| To Wor.{Arthur Wormald - General Works Manager} from Sg.{Arthur F. Sidgreaves - MD} copy to R.{Sir Henry Royce} Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} Da.{Bernard Day - Chassis Design} X7810 SECRET "SS{S. Smith}". Sg{Arthur F. Sidgreaves - MD}18/E12.7.29. X.7820 X.7810 Referring to R1/M11.7.29 regarding 20" wheels with 7" tyres. I presume it is clear to all concerned that these must not be standardised until we have satisfied ourselves by the usual tests that they are thoroughly satisfactory and do not bring us some disadvantages. We have got to be specially wary with wheels and tyres because we know from experience that they sometimes lead us into unexpected difficulties. Sg.{Arthur F. Sidgreaves - MD} | ||