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).
The standardisation of semi-balloon type tyres and the required steering circle for 20 HP and 40/50 HP models.
| Identifier | ExFiles\Box 53\2\ Scan116 | |
| Date | 7th July 1924 | |
| 44565 PN{Mr Northey}15/DN/7.7.24. TO Hs{Lord Ernest Hives - Chair} FROM PN{Mr Northey} SEMI-BALLOON TYPE TYRES. With reference to Hs{Lord Ernest Hives - Chair}2/LG3.7.24 - Undoubtedly we must consider standardising this type of tyre as soon as possible. From day to day we have inquiries from people who signify that they will only buy a car if we are willing to fit a Semi-Balloon type of tyre. Meanwhile, we are unable to do this until we know to what extent our steering lock will be affected and until we can feel satisfied that owners will not find themselves in the extremely embarrassing position of being unable to get any tyres to fit their rims on the Continent in the absence of Dunlops having a supply available. Please let me know what will be the steering circle for these tyres on a 20 HP and also a 40/50 HP. PN{Mr Northey} 5ft | ||