Use the Tire Finder, to find the perfect fit
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
2012 Beta
RR 350
Specs/Edit
  • Drive Type: Chain
  • Front Tire Size: 90/90-21
  • Rear Tire Size: 140/80-18
  • Chain Size: 520
  • Chain Links: 114
  • Front Sprocket/Pulley Teeth: 13
  • Rear Sprocket/Pulley Teeth: 50
For reference only, please consult your owner’s manual to confirm your sizes
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  • K778 Rear Knarly 120/90-19 Tire
    exact fit
    5.0 star rating (1)
    $111.10
    Free Same Day Shipping
    Part #: 644428 Mfg Part #: 04778182002

  • Rear K779 Gauntlet 140/80-18Tire
    exact fit
    $105.54
    Free Same Day Shipping
    Part #: 644425 Mfg Part #: 04779184002

  • Rear K784 Big Block 140/80B-18 Blackwall Tire
    exact fit
    3.7 star rating (7)
    $119.65
    Free Same Day Shipping
    Part #: 643461 Mfg Part #: 047841822B0

Viewing Results 1 - 3 of 3