SPEED AND TYRE WEAR

Sun (Auckland), Volume II, Issue 556, 8 January 1929, Page 6

SPEED AND TYRE WEAR

(RESULT OF AMERICAN STUDIES

The manufacturers of Royal Cord Tyres have called (Utentiou to the results of studies made by the Washington State College Experiment Station into certain conditions affecting tyre wear. » In the American continent highways have become so highly .developed that no longer need motor-cars travel slowly to avoid bump;. The increased average speed of cars has had an effect on tyre life which led to the research work conducted by Washington State College. These studies have shown that, if the rate of tread wear of a car travelling 20 miles an hour in a temperature of 40 degx-ees be considered 100 per cent., the same tyre will wear 371 per cent, at a temperature of SO degrees. If the speed be increased to 40 miles an hour, the rate of tread wear will be 150 per cent., at 40 degrees and 450 per cent, at SO degrees. In other words, higher temperature and higher speed have an important bearing on the life of a tyre.

IN AMERICA, TOO NEW FRONT WHEEL DRIVE CAR The first American front-wheel drive passenger car .will be exhibited at the New York motor show in January. Racing cars of this design have been used on tracks for years, but the Alvis Company of England was the first to adopt it for road use. To be made by the Hamlin Motor Corporation, this passenger vehicle has • just gone into production. The car will have a worm-drive front axle, 62 h.p. Cotninental motor, Borgs Beck clutch, worm-drive differential, Bendix brakes, Delco electrical equipment and Ross steeling gear. Bodies are being made by the Murray Corporation, and have an overall height of only 63 inches. The new front-wheel double floating axle and combination driving and steering device to be used are protected by patents.