FIRE WISDOM.

Shannon News, 21 December 1928, Page 4

FIRE WISDOM.

A loss of six pounds pressure in a balloon tire designed to carry but 30 pounds means a loss of 20 per cent, in inflation. . 3y actual test, two sets of tires, one run at recommended inflation and the other six pounds under-in-flated, showed a difference in mileage of 25, per cent. TJnder-inflation permits the easing to flatten out, causing more road friction and wearing the tread rubber over a wider area. But, more serious than this, too, low pressure may break the body of the tire by the resultant excessive strain on the cotton strands or cords, jit is highly important that inflation be maintained at pressures recommended "by manufacturers or dealers. Over-inflation has a wearing effect on balloon tires. The car has a tendency to' weave on the road* bouncing continually because the casing is too hard to absorb the road inequalities. Tests have that' a tire over-in-flated 10 pounds will wear out after having delivered but half the mileage it would give if properly inflated.