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    tire size

    Without perusing tire charts, anyone have a gut feeling about how much wider a 140-90 -16 tire would be compared to 130-90- 16; tire is a Conti Blitz ?
    1981 gs650L

    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

    #2
    10mm- 130+10=140
    1978 GS1085.

    Just remember, an opinion without 3.14 is just an onion!

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      #3
      Originally posted by Agemax View Post
      10mm- 130+10=140
      That makes sense-thanks!
      1981 gs650L

      "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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        #4
        same diameter rim, same aspect ratio so the width follows the same ratio
        1978 GS1085.

        Just remember, an opinion without 3.14 is just an onion!

        Comment


          #5
          Your next question should be "will it fit my bike?" or "should I install it on my bike?"

          The answer to both of those would be "NO".

          Motorcycle tires work a bit differently than car tires. the 140 tire needs a wider rim to properly support it. If you install it on the rim on your 650, it will be pinched into a tighter radius, which will give you a SMALLER footprint on the pavement.

          It might look "cool", but will not work as well as a properly-sized tire.

          .
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            #6
            People talk about 130 being the proper size for GS bikes with 2.5" wide rear wheels. The 650 rear wheel is 2.75" wide so I don't think a 140 will cause problems due to the sidewalls pinching in, although I'm not sure if there is clearance in the swingarm.
            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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              #7
              IIRC, stock tires worked out to be 120/90. There was not a whole lot of clearance to the swingarm when I mounted a 130 on my 650GD, but it has a 17" rim vs the 16 on the GL. I'll try to get a measurement/pictures for you when I get home, Tom.
              '83 GS650G
              '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

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                #8
                Originally posted by BigD_83 View Post
                IIRC, stock tires worked out to be 120/90. There was not a whole lot of clearance to the swingarm when I mounted a 130 on my 650GD, but it has a 17" rim vs the 16 on the GL. I'll try to get a measurement/pictures for you when I get home, Tom.
                Stock size tire was a 130 on the GL w/16" wheel.
                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

                Comment


                  #9
                  Oh...really? Thank you. I did not know that. One more difference between the Gs and Ls of which I am now aware.
                  '83 GS650G
                  '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

                  Comment


                    #10
                    Originally posted by Nessism View Post
                    People talk about 130 being the proper size for GS bikes with 2.5" wide rear wheels. The 650 rear wheel is 2.75" wide so I don't think a 140 will cause problems due to the sidewalls pinching in, although I'm not sure if there is clearance in the swingarm.
                    Yes, swingarm clearance under harsh conditions (bumpy road on right turn) would be my worry with the wider 140. I'll stick to what I got as it works well . Don't need it yet anyway, as my tires look good BUT they are getting old!
                    1981 gs650L

                    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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