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315/45R21 Tires

315/45R21 tires have a diameter of 32.2", a section width of 12.4", and a wheel diameter of 21". The circumference is 101.0" and they have 627 revolutions per mile.
Specs may vary by manufacturer. learn more
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315/45R21 Tire Front
12.4"
32.2"
315/45R21 Tire Side
21 Inch Wheel
Circumference
101.0"
21"
5.6"
627 Revs/Mile
315/45R21
Diameter : 32.2"
Width : 12.4"
Wheel : 21"
Sidewall : 5.6"
Circum. : 101.0"
Revs/Mile : 627

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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Select a Size to Compare Prices on Available Tires

Continental Tires
 Continental PremiumContact 6 315/45R21
PremiumContact 6
Summer | 116Y SL
Avg. $386.00
 Grand Touring