305/30R21 Tires

305/30R21 tires have a diameter of 28.2", a section width of 12.0", and a wheel diameter of 21". The circumference is 88.6" and they have 715 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

12.0"

28.2"

88.6"

21"

3.6"

715 Revs/Mile

305/30R21

Diameter : 28.2"

Width : 12.0"

Wheel : 21" x 10.5-11.5"

Sidewall : 3.6"

Circum. : 88.6"

Revs/Mile : 715

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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