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).
Log detailing the status and placement of Engellert tyres.
| Identifier | ExFiles\Box 157\4\ scan0027 | |
| Date | 16th February 1922 guessed | |
| X4376 Re Engellert Tyres Nº1. 1.009 Off Front Wheel 1.021 - Rear 1.008 Near Front Wheel 1.109 - Rear Wheel Now on Off Front Wheel. Nº2. 1.009 Near Front Wheel 1.021 - Rear 1.008 Off Front 1.109 " Rear Now on Near Front Wheel Nº3. 1.009. Off Rear Wheel 1.021. ' Front 1.008. Near Rear 1.109. ' Front Now on Off Rear Wheel. Nº4. 1.009 Near Rear Wheel 1.021 " Front 314 Off Rear 2.374 miles Burst. Nº5. 691 Off Rear Wheel 1.109 " Front Now on Near Rear Wheel | ||