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).
Test log for 32 x 4½ Rapson S-S Cord Tyres with Deflector Tubes.
| Identifier | ExFiles\Box 39\1\ Scan066 | |
| Date | 3rd February 1924 | |
| 32 X 4½ RAPSON S-S CORD TYRES WITH DEFLECTOR TUBE. DATE. | TYRE NOS. | WHERE FITTED. | SPEEDO-METER READING. | DAYS RUN. | TOTAL MILEAGE. | REMARKS. 3.2.24 | 63146 63253 63141 63142 | O.S. rear N.S. rear O.S. front N.S. front. | 8,432 | 104 | 6735 | Air pressure front 35 lbs. rear 40 " 4.2.24 | " | " | 8,641 | 209 | 6944 | 6.2.24 | " | " | 8,859 | 218 | 7162 | 7.2.24 | " | " | 9,025 | 166 | 7328 | 8.2.24 | " | " | 9,265 | 240 | 7568 | 9.2.24 10.2.24 | " | " | 9,414 | 149 | 7717 | 11.2.24 | " | " | 9,552 | 138 | 7855 | 12.2.24 | " | " | 9,701 | 149 | 8004 | 13.2.24 | " | " | 9,872 | 171 | 8175 | 14.2.24 | " | " | 9,993 | 121 | 8296 | 14.2.24 | 63141 63124 63146 63253 | O.S. rear N.S. rear O.S. front N.S. front | 0,074 | 81 | 8377 | Rear tyres changed to front Front tyres changed to rear Speedometer reading 9,993 14.2.24. 15.2.24 | " | " | 0,264 | 190 | 8567 | Rear tyres worn down to canvas. 16.2.24 17.2.24 | " | " | 0,401 | 137 | 8704 | | ||