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 an India Super 'B' tyre, including a tread pattern print and dimensional data.
| Identifier | ExFiles\Box 157\6\ scan0135 | |
| Date | 12th April 1937 guessed | |
| INDIA SUPER 'B' SIZE 6.00/17(4.0 TOTAL AREA = 29.40 SQ. INS. ROAD CONTACT = 20.32 " " GROOVE = 9.08 " " SKID LINE LENGTH - 73.16 INS. LOAD 13 CWTS. AT 40LBS./IN² PRESSURE. | ||