TYRE DEVELOPMENT
STEADY INCREASE IN CROSSSECTIONAL DIAMETERS. An interesting comparison of the development of alrger cross-sectional tyre diameters, with a corersponding decrease in wheel sizes, is shown in the accompanying size table of tyres use don small cars: 1924, 30 x 31; 1926, 4.40-21; 1928, 4.50-21; 1930, 4.75-19; 1932, 5.25-18, 6.50-16, 7.50-15, 8.25-15, 9.00-13. The latest development in tyres is the new Goodyear airwheel tyre—those big, pillow-like balloon tyres recently introduced by the Goodyear Tyre and Rubber Company. These airwheel tyres can now be fitted to no less than fifteen of the popular makes of cars. Goodyear engineers state that the public is now offered a choice of four sizes—6.so-16, 7.50-15, 8.2515, and 9.00-13.
Air pressure in the new tyres varies with, teh weight of the car and the size of the tyre used. On the 6.50-16, for instance, which is the most popular airwheel tyre for Ford, Chevrolet, and Plymouth cars, the pressure is from 12 to 15 lbs of air. In the 9.00-13 the pressure ranges from 10 to 20 lbs, depending upon the car weight. Maed up in complete units of Goodyear airwheel tyre,, 'tube, and disc wheels, the new equipment is ready to slip on the axles of those 15 makes of cars.
These new airwheel»tyres aife a direct development of the airwheel that Goodyear introduced into aviation some years ago, and which revolutionised the tyre equipment for aeroplanes. Goodyear airwheel tyres for automobiles have been developed over the past two years.
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Bibliographic details
Waipa Post, Volume 45, Issue 3250, 3 November 1932, Page 2
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246TYRE DEVELOPMENT Waipa Post, Volume 45, Issue 3250, 3 November 1932, Page 2
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