245/45R20 tires have a diameter of 28.7″, a section width of 9.6″, and a wheel diameter of 20″. The circumference is 90.1″ and they have 704 revolutions per mile.
Generally they are approved to be mounted on 7.5-9″ wide wheels.
245/45R20
Diameter : 28.7″
Width : 9.6″
Wheel : 20″ x 7.5-9″
Sidewall : 4.3″
Circum. : 90.1″
Revs/Mile : 704
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