The Bridgeport evening farmer., 1914-01-01
AUTOMOBILE NEWS
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 Resiliency is primarily governed by the construction and quality of the tires but is largely influenced by the imitation and the weight carried. A inch tire inflated to 70 lbs pressure and carrying a weight of 800 lbs will naturally ride easier than the same size tire with the same imitation car rying a weight of TOO lbs. The heavier weight causes some def1ection of the tire on the ground and increases the action adding to the comfort of the ride. As the defiection CT f1attening of the tire is increased either by weight or reducing the air pressure, most of the vibration is absorbed by the tires and not by the springs of the car. The danger is in going to an eA- treme, and a great many car owners. in this way. sacrifice tire eciency and maximum mileage.
 If you find the tires ride hard when inflated to 80 lbs. pressure, it is safe to reduce the pressure to 75 ID S. or TO lbs, providing this. does not permit the tires to bulge or hatten under the weight of the car.
 Don't make the mistake of guessing a tire pressure gauge at least once every week-the tires sometimes ap- pear to round up pretty well but when tested with gauge you may find the pressure is entirely too low to <se- cure best results.
 A great many tires are damaged in a. number of ways from riding soft. This particularly is true during the summer season. Tire users seem to be under the inpressi on that there is danger of blow-outs due to sexpan- sion. There is some expansion but as 3. matter of fact it is not in proportion to the increase in temperature. For | xa- 2-4 air. in a tire increases from 60 degrees to 80 degrees it does not mean that the air pressure per square inch in- creases from 60 to 80 lbs. With the change in temperature mentioned, it actually results in an increase of 3 lbs. pressure per square inch, i. e. if the temperature of the air in tire grees the air pressure increases from 60 to B lbs
 On a hot day it will be observed that driving a tire soft for some dis tance(ov a brick pavement will heat it considerably more than the tire upon the opposite wheel. inflated to a Higher pressure. This is caused nat urally by the increased bending h the side walls of the soft tire and the in creased road friction due to dehection the excessive bending and heating. is detrimental in many respects. The Reflection and wave in front of the tires require more power from the eEi- zine. The kneading action results in separation of the rubber cover from the body and the several plies of fab- ric in the body do not take bumps and strains of traction uniformly and have a tendency to work loose ~ chafing then occurs and ultimately a blow out Z Pinched inner tubes \are usually caused by the tires being under pres sure and nof fitting snugly to the rims
 The adhesion of 9 tube to the case and deterioration of the rubber may be caused by lack of fabrication, but as a, usual thing may be traced to ex- cessive heating from riding the tire soft.
 Reinhate the tires occasionally as the inner tubes are slightly permeabIe When the rubber is heated to 80 de- grees or more, IS per cent. to 20 per cent. of the pressure is lost. It is not advisable to inf1ate tires with the ex- haust from the engine as oil and cer- tain gases are destructive to the rub ber-this does not have reference to pumps operated by power from the engine. Air is the best for inhation Occasionally dehate the tires and fill with fresh supply of air.