Announcement

Collapse
No announcement yet.

tire size converter?

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    tire size converter?

    my gs call for 3.50h-19 and 4.50h-17 tires. what size are these tires in metric sizes please?
    Tags: None
    #2
    Originally posted by kevinwcarr View Post
    my gs call for 3.50h-19 and 4.50h-17 tires. what size are these tires in metric sizes please?
    Following the formula of 25.4mm to the inch, the direct sizes would be 88.9 and 114.3mm. Since those sizes do not exist, you would go up to 90 and 120.
    Also nice to know ... since most bike speedometers are rather optimistic, if you go to a 100 size front tire, it will likely correct that inaccuracy.

    .
    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
    Siblings and Spouses
    Mom's first ride
    Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
    (Click on my username in the upper-left corner for e-mail info.)

    Comment

      #3
      Originally posted by Steve View Post
      Following the formula of 25.4mm to the inch, the direct sizes would be 88.9 and 114.3mm. Since those sizes do not exist, you would go up to 90 and 120.
      Also nice to know ... since most bike speedometers are rather optimistic, if you go to a 100 size front tire, it will likely correct that inaccuracy.

      .
      likewise most of us use the 100/90-19 front, but use a 130/90-17 rear tire

      Comment

        #4
        why do most of you put a 130 on there? When I bought my gs850 it came with a 140. I'm looking into getting new rubbers before too long. The 140 fits fine but since I had never driven on a 130 just wondering if theres a nice perk I'm missing out on.

        Comment

          #5
          Originally posted by biker_guy View Post
          why do most of you put a 130 on there? When I bought my gs850 it came with a 140. I'm looking into getting new rubbers before too long. The 140 fits fine but since I had never driven on a 130 just wondering if theres a nice perk I'm missing out on.
          140 is too wide for the rim; narrow GS rim pinches in the sidewall which causes a more rounded contact patch than desired. 130 doesn't have this issue.
          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

            #6
            Here's a good conversion chart.

            Home Page of Steel Thunder Custom Cycles
            http://www.steelthundercc.com/tiresizes.html
            Home Page for Steel Thunder Custom Cycles, aftermarket motorcycle parts and vehicle bill of sale forms.
            1981 GS 450L

            2007 Kawasaki Vulcan 900 Custom

            The good we do no one remembers.
            The bad we do no one forgets.

            Mark 5:36 -- Overhearing what they said, Jesus told him, "Don't be afraid; just believe".

            Comment

            Previous template Next
            Working...
            X