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Tire Size...Want to Make Sure

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    Tire Size...Want to Make Sure

    For my 1979 GS750E, the book says...
    Front Tire: 3.25H19-4PR
    Back Tire: 4.00H18-4PR
    I assume the following will be okay replacement sizes:
    Front Tire: 100/90H-19
    Back Tire: 120/90H-18
    Any suggested brands/models? I'm not an aggressive rider...just a weekend rider...only 2500 miles/year.
    I did try the search first, but still was not sure. Thanks for any help!

    #2
    Your sizes are correct.

    Avon Roadrider is best performance tire value, Bridgestone Spitfire best value in a name brand, Chen Shin HiMax best value overall.
    Ed

    To measure is to know.

    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

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      #3
      Those sizes will be fine. I like the Dunlop GT501's.

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        #4
        Shinko Tourmaster, V rated and inexpensive.

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          #5
          Originally posted by 1979GS750E View Post
          For my 1979 GS750E, the book says...
          Front Tire: 3.25H19-4PR
          Back Tire: 4.00H18-4PR
          I assume the following will be okay replacement sizes:
          Front Tire: 100/90H-19
          Back Tire: 120/90H-18

          How do you make these conversions?

          Comment


            #6
            Originally posted by mwootto View Post
            How do you make these conversions?
            25.4 millimeters to the inch.

            3.25" x 25.4 = 82.55. Next size up is actually a 90, but most of us run a 100 to minimize the speedometer error.

            4.00" x 25.4 = 101.6. Next size up is 110, but again, most will run a 120.

            There is no advantage to going any larger than that, as the wider tire will get pinched into a tighter radius to fit the rim, and will actually give you a smaller contact patch.

            .
            sigpic
            mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
            hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
            #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
            #2 son: 1980 GS1000G
            Family Portrait
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            (Click on my username in the upper-left corner for e-mail info.)

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              #7
              Originally posted by Steve View Post
              25.4 millimeters to the inch.

              3.25" x 25.4 = 82.55. Next size up is actually a 90, but most of us run a 100 to minimize the speedometer error.

              4.00" x 25.4 = 101.6. Next size up is 110, but again, most will run a 120.

              .
              Ah darn I just ordered tires for my gs425 90/90/18 in the front and 110/90/18 in the back. You think I should have bumped those up to 100 and 120 respectively?

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                #8
                Originally posted by mwootto View Post
                Ah darn I just ordered tires for my gs425 90/90/18 in the front and 110/90/18 in the back. You think I should have bumped those up to 100 and 120 respectively?

                NO Leave them be

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                  #9
                  Originally posted by sharpy View Post
                  NO Leave them be

                  haha thanks for the assuring response! i will

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