WHY TYRES WEAR

Hawera Star, Volume XLVII, 2 June 1928, Page 14

WHY TYRES WEAR

The third and final article of the series on the above subject, supplied by the Dunlop Company, treats on the following factor: Misalignment, etc.--These conditions are. fairly well known. They have been with -us ever since the advent of automobiles, and, consequently, have been given a lot of study. The average operator knows misalignment wear by its varied appearance. It is mentioned only in this study as a reminder that mechanical derangement of the automobile will cause fast tread wear, and is in the same general category as other operating conditions reierred to as new and recently developed reasons. In addition to these, there are other factors, perhaps of minor importance, but here and there prevalent. None of the conditions outlined are all prevalent. at the same time fortunately, or a tyre would give no milage at all, but some of them are ever prevalent in a more or less degree, and sometimes one or more of them are quite severe. Consequently, there are cases where balloon tyres will be worn down prematurely. The rate of wear on high pressure tyres is practically the same, hut high pressure tyres have the tread concentrated in a smaller area, have a deeper tread design, less flexibility, and for that reason do not show the effect! of these operating conditions as quickly. However, high pressure tyres used under the same present-day conditions as balloon tyres will show the same variation in wear. The customer may not realise that automobile activity has increased, operating conditions have changed very greatly, people are driving much faster thaii they did three or four years ago, and good roads, plus organised traffic systems have put more strain on tyres than ever before. From a tyre wear standpoint, operating conditions are growing worse instead of better, making it apparent that the responsibility for excessive tyre wear is really in the hands of the tyre user. Therefore, the user should understand thoroughly the causes of excessive tyre wear, cited in these articles, data of which was gathered by the Rubber Association of America.