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).
Results of testing 6' tyres on 20 HP cars to prevent wobbles.
| Identifier | ExFiles\Box 58\1\ Scan011 | |
| Date | 22th November 1926 | |
| To B.J. from Hs.{Lord Ernest Hives - Chair} C to PN{Mr Northey} (struck out) E to WG{Mr Gill - Financial Director} (struck out) X5820 Hs{Lord Ernest Hives - Chair}4/LG22.11.26. 20 HP. TYRES. X4565 Replying to BJ4/E22.11.26. A 20 HP. car (5-G-11) was run in France by R.{Sir Henry Royce} in the Spring of 1925 fitted with 6" tyres. The car ran altogether 7000/8000 miles. This car however did not have front wheel brakes. Since then we have run local tests to satisfy ourselves that if necessary 6" tyres can be used on front wheel brake cars with hydraulic dampers without risk of wobbles. Hs.{Lord Ernest Hives - Chair} | ||