Correct-tyre -pressure is a most important factor—far in.a..:•e so than
is realized-by the average motorist or even the com- mercial vehicle user to whom -the reduction Of`a penny per vehicle mile in the, annual' running of a fleet may well mean a thousand wands oritnore. Not only is it:a question of actual tyre economy and. durability; -hut also :Of the .proportion of power developed by the:engine to that available for actual movement along the road. Any low-pressure tyre should be tested at least once every ten days, and it will, generally be found that more air is requited. Nowadays-any job to be undertaken about a motor vehicle to conduce to better running - or.to less expenditure must be made easy or neglect will in nine cases out of ten result. This is in the nature of progress. It is therefore high time that automatic tyre pumping was given proper attention at the hands of car manufacturers. It is, I know, always easy to suggest additions to equipment if you are not personally concerned with production in which - CPA clearly has to be very carefully considered, especially:at well-competitive times as now exist; the ottimhand; there is such a thiug, as advertisement, and I do _Trot think that the manufacturer, in adopting _a mechanical tyre pump on his chassis as standard, is likely to suffer in his car sales in the long • run. I can only call to mind one British make which ha, such a fitting and a few American ears, of large size so equipped-.
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