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).
Log sheet detailing daily tyre usage, mileage, routes, and performance remarks.
| Identifier | ExFiles\Box 45\1\ Scan224 | |
| Date | 5th June 1921 | |
| Date. | Tyres fitted. | Position On car. | Total miles. | Daily miles. | Route. | Remarks. | | | F | R | 1.6.21 | WGD.4088 | O.{Mr Oldham} front | 4810 | | 347 | Derby to London and back. | Average speed 25 M.P.H. Good roads. 2.6.21 | WGD.4261 | N front | 4810 | | | WGD.4998 | O rear | | 4810 | | WGD.4257 | N rear | | | 3.6.21 | WGD.4088 | O front | 4823 | | 13 | Local. | | WGD.4261 | N front | 4823 | | | WGD.4998 | O rear | | 4823 | | WGD.4257 | N rear | | | 4.6.21 | WGD.4088 | O front | 4845 | | 22 | Local | No.4257- burst. This cover is worn through. Taken off. Total miles run 4845. Both rear tyres finished. 5.6.21 | WGD.4261 | N front | 4845 | | | WGD.4998 | O rear | | 4845 | | WGD.4257 | N rear | | | FOR ROLLS-ROYCE LTD., | ||