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 sheet detailing the weights of Dunlop standard and wheel base wheel assemblies.
| Identifier | ExFiles\Box 45\1\ Scan353 | |
| Date | 19th November 1925 | |
| X4050 19.11.25. Dunlop standard 40/50 HP +4050 X3809 Wheel 32 X 4½ 43 lbs. } Cover 33 X 5 38 lbs. } Fitted complete Tube 33 X 5 5 lbs. } 86 lbs. Dunlop wheel base wheel rim 21". Cover wired edge type 29 lbs. } Tube. 4½ " } Fitted complete Wheel 33¼ " } 67 lbs. ___________ | ||