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).
Specification table for the number of spokes on Dunlop and Rudge Whitworth wheels for the 20 HP model.
| Identifier | ExFiles\Box 159\7\ scan0109 | |
| Date | 17th April 1924 | |
| Hs. {Lord Ernest Hives - Chair} from TMW. X.421 17.4.24. RUDGE WHITWORTH WHEELS FOR 20 HP. The No. of spokes for both Dunlop and R.W. wheels are given below :- | | DUNLOP. | R.W. | |---|---|---| | Outer | 28 | 28 | | Inner | 56 | 42 | Hs {Lord Ernest Hives - Chair} /TMW. | ||