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).
The performance and mileage of Rapson S.S. cord tyres with deflector tubes.
| Identifier | ExFiles\Box 39\1\ Scan062 | |
| Date | 3rd February 1924 | |
| REPORT ON 32 X 4 RAPSON S.S. CORD TYRES WI DEFLECTOR TUBES. DATE. | TYRE NO'S. | WHERE FITTED. | SPEEDO-METER READING. | DAYS RUN. | TOTAL MILES. | REMARKS. 20.1.24 | 63146 63253 63141 63142 | O.S. rear N.S. rear O.S. front N.S. front. | 7,052 | 182 | 5355 | Air pressure - Front 35 lbs./sq.in. Rear 40 " " " 22.1.24 | " | " | 7,216 | 164 | 5519 | 23.1.24 | " | " | 7,311 | 95 | 5614 | 25.1.24 | " | " | 7,559 | 248 | 5862 | 26.1.24 27.1.24 | " | " | 7,613 | 54 | 5916 | 29.1.24 | " | " | 7,847 | 234 | 6150 | 30.1.24 | " | " | 7,975 | 128 | 6,278 | 31.1.24 | " | " | 8,083 | 108 | 6386 | 1.2.24 | " | " | 8,328 | 245 | 6631 | 2.2.24 3.2.24 | " | " | 8,432 | 104 | 6735 | | ||