how to measure

Width is measured in a straight line from the furthest point on one sidewall, across the tread, to the furthest point on the opposite sidewall.

The aspect ratio is the height of the tire sidewall. A smaller number means a lower profile, and the height-to-width ratio is shown as a percent.

Rim diameter is the diameter of the rim/wheel on which the tire will be mounted, in inches.

tire width
tire aspect ratio
rim diameter
1973 Honda
CB500K
  • Drive Type: Chain
  • Front Tire Size: 3.25-19
  • Rear Tire Size: 3.50-18
  • Spark Plug: DR7EA
  • Chain Size: 530
  • Chain Links: 100
  • Front Sprocket/Pulley Teeth: 17
  • Rear Sprocket/Pulley Teeth: 34
  • Battery: Y12N12A-4A-1
For reference only, please consult your owner’s manual to confirm your sizes
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  • Rear  MX907HP 120/90-18 Tire
    exact fit
    3.5 star rating (2)
    $114.85
    Free Same Day Shipping
    Part #: 545257 Mfg Part #: 870-1061

  • Rear MX887IT 120/90-18 Tire
    exact fit
    Closeout $44.06 - $119.66
    $91.88 - 25% Off
    Same Day Shipping
    Part #: 545240 Mfg Part #: 870-1007

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