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).
Performance log for 32 x 4½ RA. on S.S. cord tyres with deflector tubes.
| Identifier | ExFiles\Box 39\1\ Scan074 | |
| Date | 6th March 1924 | |
| 6.3.24 32 X 4½ RA. ON S.S. CORD TYRES WITH DEFLECTOR TUBES. DATE. TYRE NO. WHERE FITTED. SPEEDO-METER READING. DAYS RUN. TOTAL MILEAGE. REMARKS. 17.2.24 63146 O.S. rear 0,401 137 8,704 These tyres have run 8,296 miles fitted on the front. 63124 N.S. rear. 18.2.24 " " 0,528 127 8,831 Air pressure - 40 lbs. per sq. in. 19.2.24 " " 0,690 162 8,993 20.2.24 " " 0,858 168 9,161 21.2.24 " " 0,944 86 9,247 22.2.24 " " 1,010 66 9,313 29.2.24 " " 1,083 73 9,386 1.3.24 2.3.24 " " 1,136 53 9,439 | ||