315/30R21 Tires

315/30R21 tires have a diameter of 28.4", a section width of 12.4", and a wheel diameter of 21". The circumference is 89.3" and they have 709 revolutions per mile.
Generally they are approved to be mounted on 10.5-11.5" wide wheels.
Specs may vary by manufacturer. learn more

Visualizer / Alternate Sizes

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Visualizer

12.4"

28.4"

89.3"

21"

3.7"

709 Revs/Mile

315/30R21

Diameter : 28.4"

Width : 12.4"

Wheel : 21" x 10.5-11.5"

Sidewall : 3.7"

Circum. : 89.3"

Revs/Mile : 709

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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