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).
Letter from Michelin Tyre Co. Ltd. providing a table of maximum axle loads and corresponding tyre pressures.
| Identifier | ExFiles\Box 39\2\ Scan109 | |
| Date | 22th October 1921 | |
| MICHELIN TYRE Co. LTD. -2- 22nd October. 1921 Messrs. Rolls Royce Limited. 14/15 Conduit Street. W. 1. Maximum load per axle Cwts Pressure per sq: inch; Section. Single Twin Cwts Cwts 135 Cwts 60 70 55 60 50 55 150 30 60 32 65 35 75 155 35 65 40 75 45 90 165 67 65 77 75 80 80 87 90 We are, dear Sirs, Yours faithfully, MICHELIN TYRE Co. LTDN [Signature] 5891-20 | ||