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).
Fitment issues with a buttress tread tyre on a Phantom II spare wheel carrier.
| Identifier | ExFiles\Box 45\2\ Scan179 | |
| Date | 30th October 1929 | |
| X4050. COPY. By.{R.W. Bailey - Chief Engineer} From Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} c. to Hs.{Lord Ernest Hives - Chair} Da{Bernard Day - Chassis Design}/Ev{Ivan Evernden - coachwork}2/M30.10.29. PHANTOM II SPARE WHEEL CARRIERS. X.7600 X.4050 Thank you for By2/G24.10.29. We are surprised to find that the centre of the wheel carrier is 1" too low for the buttress tread Dunlop 33 X 6½ tyre, as from consideration of the geometry this means that the wheel is from 2½" to 3" greater in dia. than the silent tread Dunlop of the same nominal dimensions. If this is so we ought to reconsider our coachwork clearances, when, and if, these tyres are likely to be fitted. Could you send us a drawing of the silent tyre, and also the buttress tread tyre giving the overall diameters, so that we can consider the whole question of fitting these tyres to a car. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} | ||