325/40R21 Tires
325/40R21 tires have a diameter of 31.2", a section width of 12.8", and a wheel diameter of 21". The circumference is 98.1" and they have 646 revolutions per mile.
Generally they are approved to be mounted on 11-13" wide wheels.
Specs may vary by manufacturer. learn more
Generally they are approved to be mounted on 11-13" wide wheels.
Specs may vary by manufacturer. learn more
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12.8"
31.2"
98.1"
21"
5.1"
646 Revs/Mile
325/40R21
Diameter : 31.2"
Width : 12.8"
Wheel : 21" x 11-13"
Sidewall : 5.1"
Circum. : 98.1"
Revs/Mile : 646
Upsizing Wheels or Tires?
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