315/40R18 Tires

315/40R18 tires have a diameter of 27.9", a section width of 12.4", and a wheel diameter of 18". The circumference is 87.7" and they have 723 revolutions per mile.
Generally they are approved to be mounted on 10.5-12.5" wide wheels.
Specs may vary by manufacturer. learn more

Visualizer / Alternate Sizes

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Visualizer

12.4"

27.9"

87.7"

18"

5.0"

723 Revs/Mile

315/40R18

Diameter : 27.9"

Width : 12.4"

Wheel : 18" x 10.5-12.5"

Sidewall : 5.0"

Circum. : 87.7"

Revs/Mile : 723

Upsizing Wheels or Tires?

When searching for the perfect tire for your vehicle you need options. Click the "Alternate Sizes" button to see a list of similar tire sizes. You can then change the wheel size to see alternate sizes on a different diameter wheel.

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