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 centre of the tyre and the centre of the pivot pin when in contact with the road.
| Identifier | ExFiles\Box 180\M4\M4.2\ img006 | |
| Date | 7th February 1924 guessed | |
| OF SPRING PAD OF WHEEL SPINDLE OF TYRE VERTICAL 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 2°45' 5°50' 10°5' 3.70 ROAD | ||