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).
Tyre tread print analysis for an 'India Super Nonskid' tyre, showing contact area and load data.
| Identifier | ExFiles\Box 29\4\ Scan152 | |
| Date | 23th November 1933 guessed | |
| - INDIA SUPER NONSKID - SIZE 5.50/18 (28x5.50) TOTAL AREA = 22.54 SQ. INS. ROAD CONTACT " = 14.68 " GROOVE " = 7.86 " SKID LINE LENGTH = 56 1/2" LOAD = 8 CWTS. | ||