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
1985 KTM
250 MX
Specs/Edit
  • Drive Type: Chain
  • Front Tire Size: 90/90-21
  • Rear Tire Size: 120/90-18
  • Chain Size: 520
  • Chain Links: 116
  • Front Sprocket/Pulley Teeth: 13
  • Rear Sprocket/Pulley Teeth: 52
For reference only, please consult your owner’s manual to confirm your sizes
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  • Front M1A 90/90-21 Tire
    exact fit
    $75.88
    Same Day Shipping
    Part #: 540032 Mfg Part #: 102251

  • Front VX-40 90/90-21 Tire
    exact fit
    $72.88
    Same Day Shipping
    Part #: 644548 Mfg Part #: T10571

  • Front VX-30 80/100-21 Tire
    exact fit
    $70.88
    Same Day Shipping
    Part #: 644434 Mfg Part #: T10555

  • Rear Durotour RS-310 120/90H-18 Blackwall Tire
    exact fit
    3.9 star rating (7)
    $119.88
    Free Same Day Shipping
    Part #: 64196 Mfg Part #: 302699

Viewing Results 1 - 4 of 4