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).
System for tracking and recording tyre mileage on motor cars.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page086 | |
| Date | 16th September 1911 | |
| The photo to GJ TYRE MILEAGE. 16 Th. Sept. 1911. (511) I enclose particulars of a simple system of tyre mileage checking which I have found simple and satisfactory. The difficulty in checking tyre mileage on most modern cars is the almost universal use of detachable wheels, which, of course, means keeping check of five wheels, only four of which are actually in use on the road. The enclosed check card, I think, explains itself. I have, however, filled up a simple one. In regard to the first heading, No. of tyre, there is always a number to be found on a tyre, just something to distinguish it by, but care should be taken to pick a number on the side of the tyre below the tread, as otherwise this will be obliterated if the tyre happens to be retreaded. TYRE MILEAGE. NO. OF TYRE .. .. 2,079 MAKE OF TYRE .. .. CLASS OF TREAD .. Round SIZE OF TYRE .. .. 880x120 NEW OR RETREAD .. New MILEAGE AND DATE WHEN TAKEN OFF 1/8/11 9,000 MILEAGE AND DATE WHEN PUT ON .. .. 2/1/11 6,000 TOTAL MILEAGE RUN 3,000 Now as to the method of using the cards it is simply as follows: Every time a new tyre is put on the car a new card is taken out and filled up, all except “Mileage and date when taken off.” When the tyre in question is worn out its card is filled up and a new card taken out for the tyre that follows it. It may so happen that the damaged tyre is repairable, and fit for a further term of use. If that be so, it is treated as if it were a new tyre; that is to say, a new card is taken out for it and proceeded with as before. Likewise, whenever the spare wheel is put on a new card must be taken out for it and filled up as before mentioned when it is dismounted. This reads rather complicated, but in reality it is very simple. All that is needed is some reliable form of mileage recorder (some form of this most useful instrument is fitted to nearly every car in the present day); the results will be well worth the slight trouble, as one can at a moment’s notice turn up the life history as it were of any tyre under discussion, and see exactly what mileage it has to its credit, or otherwise. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} JALLAND. X20 | ||