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 from Dunlop Rubber Co. detailing the features of their Straight Side Pneumatic Motor Tyres and enclosing a 1922 tyre booklet.
| Identifier | ExFiles\Box 45\1\ Scan246 | |
| Date | 30th September 1921 | |
| COPY OF LETTER RECEIVED FROM:- THE DUNLOP RUBBER CO. LTD. ASTON CROSS, BIRMINGHAM. 30th September 1921. Messrs. Rolls Royce Ltd., Nightingale Road, Osmaston Road, Derby. Dear Sirs, DUNLOP PNEUMATIC MOTOR TYRES. We have pleasure in enclosing copy of Booklet "Dunlop Tyres for 1922" wherein will be found full particulars of our manufacturing programme covering Beaded Edge and Straight Side Pneumatic Motor Tyres. Straight Side Cord Tyres. We have already written fully in connection with Dunlop Straight Side Cord Tyres and have sent a sample tyre for your inspection. Dunlop Straight Side tyres are made only with multiple ply Cord Casings, and for those not familiar with this type of tyre its special features may be summarised: The Straight Side tyre carries within itself the inextensible edges which resist the outward radial pressure due to inflation of the air tube. The Straight Side Rim provides a wider base for the tyre than is possible with a beaded edge tyre and holds the tyre more steadily, prevents roll, reduces the tendency to side slip, provides greater air space and consequently increased cushioning capacity within the tyre, and entirely eliminates accidental bursts due to careless fitting. Its attachment or removal is sound and simple, and is effected without any strenuous levering and stretching of stiff edges into or out of position, as is necessary with the beaded edge type, whilst it is impossible to pinch or nip the tube when fitting; requires no security bolts, and cannot creep whilst inflated. (Contd.) | ||