33X13R18 tires are 33.0" tall, have a section width of 13.0", and fit wheels with a diameter of 18. The circumference is 103.6" that translates into ...
33X9.5R17 tires are 33.0" tall, have a section width of 9.5", and fit wheels with a diameter of 17. The circumference is 103.6" that translates into ...
