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).
Sketches comparing different axle and tyre configurations.
| Identifier | ExFiles\Box 29\1\ Scan094 | |
| Date | 3rd January 1925 guessed | |
| FRONT (E) AS (A) BUT WITH SPRINGS ON INSIDE OF S.S. TUBE ONLY. STUD ENDS TO TAKE THRUST LOADING? NOTE OFFSET FRONT (A) OF (D) FRONT N/S R.R. STD TYPE S.S. TUBE SOLID PIVOT + TRACK AS BEFORE (B) FRONT AS (A) BUT WITH NO PIVOT PIN PENDULUM LEG IN DASHED SPRING DRIVE ALL TESTS WITH 34 x 7 3/4 BALLOON TYRES (C) HISPANO TYPE S.S. TUBE PIVOT LEAN 3" BACK TRACK 3/4" IN AT FRONT (G) PIVOT LEAN 3" BACK TRACK OF WHEELS 3/4" WIDE AT FRONT | ||