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).
Table comparing wheel and tyre weights in pounds for various car models and tyre sizes.
| Identifier | ExFiles\Box 157\1\ scan0194 | |
| Date | 19th March 1935 | |
| 19.3.35. Table 1: Headers: Vulture 6.50 x 18, Vulture 7 x 18, SpectreCodename for Phantom III 7.50 x 17, 20/25 6.00 x 19, Projected 20/25 6.00 x 17 Row: Wheel & Tyre weights - lbs. Data: 64.25, 73.25, 69.00, 64.0, 61.25 Table 2: Headers: Bentley 5.50 x 18, Projected Bentley 6.25 x 16, Buick 6.25 x 16, Graham 7 x 16, Essex 6.25 x 16 Row: Wheel & Tyre weights - lbs. Data: 50.62, 45 approx., 46.25, 53.375, 43.125. | ||