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        TIRE SCHOOL
        How to make tires
        Tire Specification
        Tire Components
        Off-The-Road Tire
        Tips
        Tire's New Policy
        LI, SI & LR
        ST(Special Trailer) tires
        How to Measure A Wheel

        Home >> Tire School >>  Off-The-Road Tire

        Off-The-Road Tire

        a.  T.R.A. Classification and application.

        Service Vehciles T.R.A. CODE
        Loader and Dozer Shovels Loaders Bulldozers L-2
        L-3
        L-4
        L-5
        L-5S
        Earthmover

        Dump Trucks Coal haulers Scrapers

        E-3
        E-4
        E-7
        Grader Grader G-2
        G-3
        Compactor Tire-rollers C-1
        C-2
        Industrial Mechanical Handling Equipments IND3
        IND4
        IND5

        b.  The different Off-The-Road Tire families.

        100 Series ( Narrow Base )

        The H/S aspect ratio is approximately equal to 1.00
        The section width, given in inches is a whole number
        Example: 18.00R25




        80 Series ( Wide Base )

        The H/S aspect ratio is approximately equal to 0.80
        The section width, given in inches is a whole number followed by a fraction
        Example: 20.5R25= 525/80R25


        65 Series (Low Profile Tires )

        The H/S aspect ratio is approximately equal to 0.65
        The section width, given in millimeters followed by the number 65

        Example: 750/65R25 


         
        c.   Comparison of tread depth


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