HELPFUL INFORMATION

Hokitika Guardian, 19 February 1924, Page 1

HELPFUL INFORMATION

ABOUT 'mats AN!) THEIR CARE. The rubber on tlie sidewalls of tyrc-s is not made heavy purposely. It must he thin to prevent excessive heating, vet heavy enough to protect the earcases underneath front the elements, says the Goodyear News. A tread on a cord easing does not wear as fast as the trend on a fabric owing to the fact that the cord carcase is more resilient and relieves the tread of much strain. The traction wave or flattening of a tyre causes it to continually roll up liill. If the tyre is not properly inflated the wave is larger and of course requires more power—gasoline—to move the ear. Neglected trend cuts cause a trend t > wear abnormally. When a lyre wobbles mi a wheel it may he only tin- rim that is causing it. This can be easily straightened by a reapplication. A tyre is most resilient when properly inflated. Heat has very little elfeet on the air pressure in a tyre, it requiring a change of 12tl degrees to increase the pressure from three to five pounds. One exact pressure cannot he sullicieiil for all tyres of the same size. Loads, roads and driving speed must he taken into consideration. If a tyre is bruised so bard that it is pinched up against the rim, you will iind a fabric break close to the bead. A tread wears clear across on an un-der-inflated tyre. The tread on a properly inflated tyre wears in the centre first. A heavy or dead repair breaks at the edges because it is not so resilient as the rest of the tyre and therefore hammers its way through with every revolution. The strain is increased in this way. Tyres are certainly cut. easier in wetweather than in dry—that’s why you wet rubber when you want to cut it with a knife. Sharp objects are olten obscured by mud so car owners should inspect their tyres after driving on wet streets or roads and have all cuts properly repaired. Sand or dirt casings olten cause the inner tubes to lie porous. Care should , lie exercised to see that all sand or dirt is out of the casing before a tube is placed in it. Too much soaps lone in a casing accumulates in a spot, and will injure the tvre. and more especially the' inner tiilx-. Too little soapstone or talcum enables the tube to stisk to the casing. 1 hits ruining it. ( Water inside of an inner tube causes valve trouble.

When it flap gets out of place, and runs down alongside of a tube, into the body of the tyre, where the hinge net ion comes, the edges will cui through the fabric's or cords of flic casing. An inner tube does not field strength to a. tyre. And it will never adjust itself or slip inside the tyre after it* is inflated. Inner tubes can he torn easily in any direction alter it. i- onerstarted. A tube- under pressure is generally stretched to tome extent, ■ind just as quick as it is punctured or pinched, it will rip because its own tension resembles tearing with Hie hand. An ordinary valve plunger will stand 800 pounds pressure to the square ii¥'h. Loose base nuts uTt-on cause \aLe .stems to pul! out—autl they eau-e i nhes to leak, too.