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
1984 BMW
R100CS
For reference only, please consult your owner’s manual to confirm your sizes
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Viewing Results 1 - 6 of 6
  • Front/Rear HF318 4.00H-18 Blackwall Tire
    exact fit
    5.0 star rating (3)
    $80.88
    Same Day Shipping
    Part #: 540773 Mfg Part #: 25-31818-400BTT

  • Front HF317 3.25H-19 Blackwall Tire
    exact fit
    4.5 star rating (20)
    $68.88
    Same Day Shipping
    Part #: 540772 Mfg Part #: 25-31719-325BTT

  • Front Or Rear HF314 3.25-19 Blackwall Tire
    exact fit
    $75.88
    Same Day Shipping
    Part #: 544581 Mfg Part #: 25-31419-325BTT

  • Front Or Rear HF307 4.00-18 Blackwall Tire
    exact fit
    $79.88
    Same Day Shipping
    Part #: 544579 Mfg Part #: 25-30718-400BTT

  • Rear DM1154 110/100-18 Soft Terrain Tire
    exact fit
    5.0 star rating (1)
    $86.88
    Same Day Shipping
    Part #: 643726 Mfg Part #: 25-115418-110TT

  • Rear DM1153 110/100-18 Hard Terrain Tire
    exact fit
    Part #: 643725 Mfg Part #: 25-115318-110TT

Viewing Results 1 - 6 of 6