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 and Dunlop tyres, tubes, and wheels.
| Identifier | ExFiles\Box 29\1\ Scan351 | |
| Date | 13th November 1928 guessed | |
| contd :- -2- Particulars of the Michelin compared with the standard 6.75" Dunlop are :- | Weight. | DUNLOP 6.75 - 21" rims. | MICHELIN. 17 X 50. | |---|---|---| | Tyre. | 36 1/2 lbs. | 35 lbs. | | Tube. | 5 lbs. | 4 lbs. | | Tyre, tube and wheel. | 75 lbs. | 72 lbs. | Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||