A CAUSE OF WORN TIRES.

Evening Post, Volume XCIII, Issue 99, 26 April 1917, Page 10

A CAUSE OF WORN TIRES.

The period of usefulness of a tyre is governed by the care it receives—or the attention is fails to get. Much has been said of the need of efficient .inflation, and tire manufacturers have found it necessary to frame and. issue lists of tire pressures according to the loads to. be carried. That under-inflation has been and still is the ruin of many a firstclass cover, is borne out by the examinations made in the repair departments of tire mills, but there is another factor in tire destruction of a more subtle, kind. This is mis-alignment of the wheels, the frame, or the axles, and however small, it exerts a rasping effect on the tread and wears it away much sooner than is reasonably to bo expected. Tho foregoing applies to motor-cycles, but more especially to the rear wheels. An expert was recently, shown a new cover fitted to the rear wheel of a standard American motor-cycle, which the owner said had not covered 300 miles, yet the tread showed undoubted signs of hard..wear, as if it had been driven for some thousands of mile 3 over flinty surfaces. A close examination of the tread revealed the fact that the rubber was very minutely torn, suggesting that'the-wheel wae not tracking, and an inspection showed that tho rim was a quarter of an inch nearer one stay than tha other.