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Show Says Rubber Tires Are ' an Aid in Tractor Work Low pressure pneumatic tires for tractors have many advantages over Iron or steel tires, says Prof. F. L. Fairbanks of the New York State College of Agriculture. They travel over rough ground with less jar than do Iron-clad wheels, he explains, and this helps to prolong the life of the tractor. Air-filled tires make life more enjoyable en-joyable for the driver, for his machine ma-chine rides and guides more easily. Stones and other objects dent the tire momentarily, but the tractor passes over them with greater ease. This, he estimates, raises the drawing power about 25 per cent When iron or steel wheels are used in a muddy or snowy field, mud or snow packs In among the lugs. This reduces their power to grip and results In total reduced drawing draw-ing power. He contrasts this with rubber tires which do not pick up and hold mud or snow. It the field becomes too slippery, chains can be used. Since chains creep around the tire, he adds, they tend to clean the tires. |