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).
Table of dimensions and weights for Dunlop Silent Tread 'Fort' type tyres.
| Identifier | ExFiles\Box 45\2\ Scan148 | |
| Date | 24th April 1929 | |
| 24.4.29. DIMENSIONS AND WEIGHTS OF DUNLOP SILENT TREAD TYRES, 'FORT' TYPE. Size. Approx:Weight. Approx:Inflated Approx:Effective lbs.ozs. Diameter. Width. Radius. 6.00-19 - 33- 2. 32.13" 5.98" 15.00" 6.00-20 - 33-14 33.19" 5.96" 15.55" 6.00-21 - 35- 4. 34.24" 6.00" 16.06" 7.00-20 - 40- 4. 34.48" 6.80" 16.06" 7.00-21. - 44-14. 35.45" 7.02" 16.54" - - - - - - - - - - Development Manager. DUNLOP RUBBER COMPANY LTD. | ||