345/30R20 tires have a diameter of 28.1", a section width of 13.6", and a wheel diameter of 20". The circumference is 88.4" and the revolutions per mile are 738. Specs may vary by manufacturer. learn more
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.