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).
List of ten criteria for evaluating wheels and tyres, along with mileage for road testing.
| Identifier | ExFiles\Box 154a\3\ scan0213 | |
| Date | 27th March 1936 guessed | |
| Wheels & Tyres. (1) Light weight. (2) Good steering lock. (3) Freedom from tramp. (4) Possibility of jacking with the tyre down. (5) Wing and wheel arch clearance. (6) Gear ratio. (7) Groans and general tyre noises. (8) Skidding and security generally. (9) Evenness of tyre wear. (10) Strength of wheel, including hitting kerb. 5,000 miles in England, including 1,000 miles in London traffic. 10,000 miles in France. | ||