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).
Diagram showing the distance between the tyre centre and pivot pin centre when in contact with the road.
| Identifier | ExFiles\Box 22\1\ Scan068 | |
| Date | 16th January 1924 guessed | |
| FOR BEARING PAD C OF WHEEL SPINDLE C OF TYRE VERTICAL C L C OF PIVOT PIN DIAMETER OF WHEEL 895 m/m OR 35.236" SCALE 1/2 DIAGRAM SHOWING THE DISTANCE BETWEEN CENTRE OF TYRE & CENTRE OF PIVOT PIN WHEN IN CONTACT WITH THE ROAD 10°-19' 8°-50' 5.45" 3°-7' 2°-5' ROAD 3.25" | ||