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 detailing the features of a tyre and discussing potential manufacturing.
| Identifier | ExFiles\Box 53\1\ Scan015 | |
| Date | 30th May 1930 guessed | |
| -2- cessive flection better than the tyres of our competitors, in fact, this is one of the main reasons why they last longer. If there is any other information I can give, please do not hesitate to ask me. If your people wish to cut up the section and test it in any way, they are quite at liberty to do so. They will find that the adhesion of the various layers of cord are exceptionally good. I would also call particular attention to the following features. (a) The way in which the walls are strengthened just above the wire bead core. This strengthening prevents fractures occuring at this point. (b) The construction of the wire bead core which is formed of a series of layers of braided piano wire. (c) The thickness and width of the cushion rubber which is situated between the tread and the cord foundation. (d) The design of tread. The central bar makes the tyre a very light steering tyre. The side chevrons hold the centre bar up to its work and makes the cover an excellent non-skid. (e) The thick tough side wall rubber adequately protects the cord foundation against rut and curb damage. I was wondering why you had not looked in for such a long time. Under present conditions it is impossible to make any permanent plans. I also wish that the Miller tyre was an English made tyre. The Miller people may possibly open a factory over here in the same way as your people have done in America, once the business justifies them. The possibility, however, is very remote unless the tariff goes on, when we certainly believe they will commence manufacturing over here. I quite agree that better mileages are obtained on Rolls-Royce cars than on similar cars of other makes of the same horse power and weight. In my opinion this is not due only to transmission, but is also due to the very efficient braking mechanism and to the weight distribution. With kind regards, Yours sincerely, (John Cooper) | ||