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).
Table of weights for front and rear road springs for a Super-Sports model.
| Identifier | ExFiles\Box 16\7\ Scan156 | |
| Date | 19th February 1929 guessed | |
| SUPER-SPORTS X7410 WEIGHTS OF ROAD SPRINGS. FRONT. F78794 TYPE. | BULK.WEIGHT. 950 LBS. | 39 LBS 1,000 LBS. | 40.25 LBS 1,050 LBS | 1,100 LBS | 40.25 LBS 1,150 LBS. | 1,200 LBS | 1,250 LBS | REAR F79447 TYPE | BULK WEIGHT 1,100 LBS | 78.75. LBS 1,150 LBS | 1,200 LBS | 1,250 LBS | 1,300 LBS | 1,350 LBS. | 1,400 LBS | 84 LBS 1,450 LBS | 1,500 LBS | 86.25 LBS. | ||