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Anybody know where I can get a conversion chart to go from the old way (ie. 3.60x19) to metric (ie. 90/90/19)? Its time for a new front tire and I'd like to know what I'm getting is the correct size.
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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". -
My 1985 runs a 100/90/19 well, but the stock size is 90/90/19Comment
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Mine came with a 3.60x19 but I have a 90/90/19 from a parts bike that is in excellent shape. The 3.60 is stock for '81, but finding a metric comparison for it has been hard. I guess I have the answer. Thanks1981 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
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Here's a general USA/metric conversion chart.
For example, a 90/90-19 has a tread width of 90mm or 3.54in. with a sidewall height (aspect ratio) of 90% of 90mm, or 81mm. A 90/80 would be 90mm wide and sidewall height of 80% of 90mm or 72mm.
Beware that tire sizes vary with manufacturer. My Avon AM21 110/90-18 I bought for my GS450S (same as an E model) is really closer to 4.5in. or 114mm wide, when 110mm is 4.33 in. OE size was 3.50-18.
I think most guys fit 90/90-19 or 100/90-19 on the front of the L models and 120/80-17 on the rear, but don't take my word for it!
I tried to fit Dunlop GT501's in 100/90-18 front and 120/90-18 rear on my bike and they wouldn't fit, rubbed the fender in front and swing arm in back. Went with 90/90-18 and 110/90-18 Avon Roadrunners (AM20 and AM21) Great tires, are hardly worn at all 6000 miles later and have great grip on wet or dry asphalt.Comment
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