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).
Weight comparison between Michelin disc wheels and Dunlop detachable wire wheels.
| Identifier | ExFiles\Box 181\M11\ img233 | |
| Date | 23th September 1919 | |
| Contd. -2- EHG/LH{Mr Haworth}23.9.19. WEIGHTS OF MICHELIN DISC WHEELS COMPARED WITH DUNLOP DETACHABLE WIRE WHEELS. Front. | Piece. | Michelin. lbs. | Dunlop. lbs. | |---|---|---| | Wheel less tyre. | 39.5 | 36.2 | | Hub. | 11.5 | 11.6 | | Bearings | 4.2 | 4.10" | | Lock nut & washers & cap. | 3.4 | 1.2 | | Total. | 58.6 | 53.1 | Rear. | Piece. | Michelin. lbs. | Dunlop. lbs. | |---|---|---| | Wheel less tyre. | 39.5 | 36.2 | | Hub. | 14.75 | 13.25 | | Bearings. | 4.75 | 4.75 | | Brake drum | 39.75 | 39.75 | | Sundries. | 5.5 | 4.5 | | Total. | 104.25 | 98.4 | EH. | ||