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).
Load and inflation table for low and medium pressure tyres.
| Identifier | ExFiles\Box 29\4\ Scan255 | |
| Date | 17th December 1934 guessed | |
| LOAD and INFLATION TABLE LOW AND MEDIUM PRESSURE. TYRE SECTION | TYRE LOAD IN CWTS. ---|--- | 3½ | 3¾ | 4½ | 5 | 5½ | 6 | 6½ | 7 | 7½ | 8 | 8½ | 9 | 10 | 11 | 12 | 13 | 13½ | 15 | 17 3.50 | 16 | 20 | 24 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - 4.00 | - | 18 | 22 | 26 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - 4.50/4.40 | - | - | - | 24 | - | 28 | - | 32 | - | 36 | - | - | - | - | - | - | - | - | - 4.75 | - | - | - | - | 24 | - | 28 | - | 32 | - | 36 | - | - | - | - | - | - | - | - 5.00/4.95 | - | - | - | - | - | 24 | - | 28 | - | 32 | - | 36 | - | - | - | - | - | - | - 5.25 | - | - | - | - | - | - | 24 | - | 28 | - | 32 | 36 | - | - | - | - | - | - | - 5.50 | - | - | - | - | - | - | - | - | 24 | - | 28 | 32 | 36 | - | - | - | - | - | - 6.00 | - | - | - | - | - | - | - | - | - | - | - | - | 28 | 32 | 36 | 40 | - | - | - 6.50/6.20 | - | - | - | - | - | - | - | - | - | - | - | - | - | 28 | 32 | 36 | 40 | - | - 7.00/6.75/6½ | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 28 | 32 | 36 | 40 | - | ||