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).
Cause of tyre noise on Spectre cars.
| Identifier | ExFiles\Box 157\1\ scan0205 | |
| Date | 10th May 1935 | |
| FILES. X405D 10.5.35. SpectreCodename for Phantom III Tyre Noise. We have proved that on dry Tarmac roads there is no noticeable difference between Goodyear, Dunlop MA. 2, and Dunlop "90" tyres when new. The reason for the very bad moan apparent on the SpectreCodename for Phantom III cars is the unevenness of the tyre tread. This has been caused by the reverse caster action on the front wheels. HS{Lord Ernest Hives - Chair}/F.Dodd. | ||