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
1978 Kawasaki
KZ650B
  • Drive Type: Chain
  • Front Tire Size: 3.25-19
  • Rear Tire Size: 4.00-18
  • Spark Plug: B7ES
  • Chain Size: 530
  • Chain Links: 102
  • Front Sprocket/Pulley Teeth: 16
  • Rear Sprocket/Pulley Teeth: 42
  • Oil Filter: 303573
  • Battery: YB10L-A2
For reference only, please consult your owner’s manual to confirm your sizes
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  • exact fit
    Rear K70 4.00S-18 Blackwall Tire
    4.5 star rating (1)
    $126.88
    Part #: 6509 Mfg Part #: 45068129

  • exact fit
    Rear D605 4.60-18 Tire
    3.5 star rating (1)
    $100.15
    Part #: 644243 Mfg Part #: 4515-4646

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