Specification table for S.M.M.T. tyres listing sizes, widths, rim types, load capacities, and inflation pressures.
| Identifier | ExFiles\Box 156\3\ scan0207 | |
| Date | 16th August 1940 guessed | |
| COPY. S.M.M.T. Size. Max:Section Width. Rim. Max: Load. Inflation Pressure. 6.00/16 6.25" 4.00 D. {John DeLooze - Company Secretary} ) or 4.00 E. {Mr Elliott - Chief Engineer} ) 1120 (4 ply) 30 6.25/16 6.70" 4.50 D. {John DeLooze - Company Secretary} ) or 4.50 E. {Mr Elliott - Chief Engineer} ) 1195 (4 ply) 30 6.50/16 6.80" 4.50 D. {John DeLooze - Company Secretary} ) or 4.50 E. {Mr Elliott - Chief Engineer} ) 1270 (4 ply) 30 7.00/16 7.35" 5.00 E. {Mr Elliott - Chief Engineer} ) or 5.00 F. {Mr Friese} ) 1410 (6 ply) 1335 (4 ply) 30 (6 ply) 28 (4 ply) 7.50/16 8.00" 5.50 E. {Mr Elliott - Chief Engineer} ) or 5.50 F. {Mr Friese} ) 1545 (6 ply) 1400 (4 ply) 30 (6 ply) 26 (4 ply) | ||
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).