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).
Specification sheet for tire and rim combinations, including recommended, permissible, and experimental options, along with estimated sectional diameters.
| Identifier | ExFiles\Box 156\3\ scan0245 | |
| Date | 25th October 1940 | |
| TIRE & RIM COMBINATIONS. First Table: TIRE SIZE. | PRESENT RIMS. RECOMMENDED PRACTICE. RECOMMENDED. | PERMISSIBLE. | WIDE BASE RIMS. EXPERIMENTAL. | PRACTICE. 5.50 | 3.50D | 4.00F | 4½ K.{Mr Kilner} | 5-K.{Mr Kilner} 6.00 | 4.00E | 4.50E | 5-K.{Mr Kilner} | 5½ K.{Mr Kilner} 6.25 | 4.25E | 4.50E | 5-K.{Mr Kilner} | 5½-K.{Mr Kilner} 6.50 | 4.50F | 5.00E, 5.00F. | 5½-K.{Mr Kilner} | 6-L. 7.00 | 5.00E, 5.00F. | 5.50F | 6-L. | 6½-L. 7.50 | 5.50F | 6.00F | 6½-L | 7-M Approved October 25, 1940. ESTIMATED SECTIONAL DIAMETERS ON VARIOUS RIMS. Second Table: NOMINAL SECTIONAL DIAMETER. | PRESENT RIMS. (Column 1) | PRESENT RIMS. (Column 2) | WIDE BASE RIMS. (Column 1) | WIDE BASE RIMS. (Column 2) 5.50 | Est.S.D. 5.65 Rim 3.50D | 5.85 4.00E | 6.08 4½-K | 6.33 5-K 6.00 | Est.S.D. 6.25 Rim 4.00F | 6.48 4.50E | 6.69 5-K | 6.91 5½-K.{Mr Kilner} 6.25 | Est.S.D. 6.50 Rim 4.25E | 6.64 4.50E | 6.82 5-K.{Mr Kilner} | 7.05 5½-K.{Mr Kilner} 6.50 | Est.S.D. 6.80 Rim 4.50E | 6.98 5.00E, 5.00F | 7.23 5½-K | 7.41 6-L 7.00 | Est.S.D. 7.35 Rim 5.00E, 5.50F. | 7.57 5.50F | 7.79 6-L | 8.03 6½-L 7.50 | Est.SD. 8.00 Rim 5.50F | 8.22 6.00F | 8.43 6½-L | 8.62 7-M | ||