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).
And typed note detailing the weights of different wheel and rim sets.
| Identifier | ExFiles\Box 3\3\ 03-page009 | |
| Date | 27th April 1910 | |
| Weights Wheels 2200 x200 3700 Total weight of set of four S & C rims & wheels 375x135 with no spare rims -- 209 lbs Ditto Vinet ------- 264 " Warland Range detachable rims. Ditto plain ------- 198 " Bare wheel only Spencer Moulton --- 308 " (Two spare rims) Segment detachable Front wheel 105 m/m Rim 28 1/2 large } 319 lbs. per set of 4. Rear " " 28. " " large } w/out JP/4/4, 27-4-10 | ||