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tire size Aspect/Ratio chart for fiquring overall tire sizes PART A
Motorcycle Tire Size and Width
To use this Chart
| 1.
| Find your tire sidewall width or size in Column 1.
| 2.
| Move right (Columns 3-11) to get your Aspect Ratio (A/R); may be on the sidewall or manufacturer's specs; most old-style tall tires are 100 A/R (Goodyear "Super Eagle", Arco, Dunlop "Safety Mileage Mk. II" & "Speedmaster Mk. II", etc.).
| 3.
| Add the figure in the box to your rim size - this is your tire diameter. NOTE: these numbers are 2 x rim width x A/R
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Column 1
| Tire size in millimeters
| Column 2
| Tread width in inches (x .0394 = width in mm)
| Columns 3 - 11
| Total sidewall height (from rim bead seat to top of tread)
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Size
| Width
| 55 A/R
| 60 A/R
| 65 A/R
| 70 A/R
| 75 A/R
| 80 A/R
| 85 A/R
| 90 A/R
| 100 A/R
| 80mm
| 3.15"
| 3.46"
| 3.77"
| 4.08"
| 4.39"
| 4.70"
| 5.01"
| 5.32"
| 5.63"
| 6.26"
| 90
| 3.54
| 3.90
| 4.25
| 4.60
| 4.95
| 5.30
| 5.65
| 6.00
| 6.35
| 7.06
| 100
| 3.94
| 4.33
| 4.72
| 5.11
| 5.50
| 5.89
| 6.28
| 6.67
| 7.06
| 7.84
| 110
| 4.33
| 4.76
| 5.19
| 5.62
| 6.05
| 6.48
| 6.91
| 7.34
| 7.77
| 8.63
| 120
| 4.72
| 5.20
| 5.67
| 6.14
| 6.61
| 7.08
| 7.55
| 8.02
| 8.49
| 9.43
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woody's wheel works screwed with this post 01-18-2007 at 09:05 AM
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