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).
Comparing the average mileage of well base tyres against straight sided cord tyres.
| Identifier | ExFiles\Box 45\2\ Scan042 | |
| Date | 17th November 1927 | |
| To C. from Hs{Lord Ernest Hives - Chair}/AJL. c. to Sg.{Arthur F. Sidgreaves - MD} BY.{R.W. Bailey - Chief Engineer} 44050 Hs{Lord Ernest Hives - Chair}/AJL1/LG17.11.27. TYRE MILEAGE. 43809/4565 We have now used well base wheels and low pressure tyres sufficiently long to be able to give a fair average life mileage for comparison with s.s. cord tyre figures. Average mileage of 11 33 X 5" s.s. cord tyres = 7,004 " " 14 33 X 6.75" w.b. tyres = 7,091 It cannot be said therefore that the life of the well base tyre is less than the old straight sided tyres under similar conditions. Hs{Lord Ernest Hives - Chair}/AJL. | ||