Show HARDEST USE GIVEN TIRES IN SUMMER inspection necessary before tours are started not only during the warm months Is the average passenger car driven at least twice as far dally daily as in the winter season but it usually Is driven very much faster for these reasons tires are subjected to more severe service and troubles with them come very mu much ch closer together in point of time during this period of heavy driving which calls for a careful inspection and revision of the equipment before long distance trips and vacations are to be made in considering the stock of tires on hand the mileage already delivered by each and its age form the best guides as to what future service may be expected of it knowing how far a certain tire has run and subtracting this distance from the average mileage obtained fro from similar tires on the same car gives the most dependable guess ai aa to its expect expectancy ancyl to borrow a term from the life insurance roan man A useful check upon any such estimate Is obtainable from its appearance find and an expert tire man it if lie ha has a casing ot off so that a thorough examination Is possible may make some quite accurate predictions but much less can be learned from inspecting a casing on the wheel heel it if the tread has ent cut through it in places which have been long neglected and have begun to raise sand blisters it if there are any swellings in the surface or any indications of approaching failure along the side walls no great dependence for future serice sen ice should be placed in lt it but it if the tread la Is practically perfect barring normal wear and no signs of weakness are apparent the casing can be relied upon for the additional mileage indicated by service previously rendered and past experience the chief reason for estimating the expected mileage that remains in the casings on the wheels Is in order to provide requisite spare tire equipment it going without lug that the extra casings carried must be more numerous and of better quality it if the tires in service are old and worn than as if they are all new |