| Show TO OBTAIN LARGE TIRE MILEAGE about three out of 0 every lour four tires that pass on oil to the scrap heap are prematurely and needlessly wa worn n out thru under inflation says a fisk rubber company expert in an underpin hated condition the tire Is more susceptible cep tible to cuts and bruises rim cuts and fabric blow outs develop because of the tremendous number of 0 different positions the tiro tire assumes which tend to create internal heat and destroy adhesive qualities of the rubberized fabric the motorist who is careful as to the tire pressure will surely obtain large tire mileage at small cost at the best the tire is only a container of air on oil which the car rolls the amount of air necessary to carry will depend absolutely upon the th amount oc work thatis that is to bo be done don e and a the load carried the motorist should determine the load land for each tire and regulate his air pressure so as to carry that load without injury to the tire to do this weigh front and rear of loaded cir car separately and divide by two which will give the wei weight as carried on each wheel now that the weight of load as carried by each wheel is known determine the air pressure by using th the factor given opposite tire size to divide the amount of the load the result being the pressure required I 1 tire divide weight of load lead by 8 W tire divide weight of load by 10 4 tire divide weight of load by 12 tire divide weight of load by 14 5 tire divide weight eight of load by 16 52 11 tiro tire divide weight of load by IS 18 EXAMPLE on a 4 tire aou ou find the load to be pounds refer to the above table and note that on oil a 4 tire 12 is the factor pounds divided by 13 12 equals GO CO therefore theredo re inflate the tire to go 60 pounds pressure As the load carried by the front tires is usually less than on oil the rear by using the method as suggested it will bo be determined that less air pressure is needed the ideal load tor for the best all around results under average conditions is as follows 3 tires pounds 31 afe tires pounds 4 tires 7 95 pounds ap 41 tires pounds 3 5 tires 1210 pounds tires 1485 pounds A load heavier than these figures may be carried but the resulting p pressure res necessary to get good tire mileage Is lisua usually lly very hard on the car and its occupants to obtain best results weigh car as suggested divide any load by figure given and inflate to that amount test air pressure at leas tonce a week |
