255/40R18

255/40R18 tires have a diameter of 26.0β€³, a section width of 10.0β€³, and a wheel diameter of 18β€³. The circumference is 81.7β€³ and they have 775 revolutions per mile.
Generally they are approved to be mounted on 8.5-10β€³ wide wheels.

255/40R18 tires have a diameter of 26.0β€³, a section width of 10.0β€³, and a wheel diameter of 18β€³. The circumference is 81.7β€³ and they have 775 revolutions per mile.
Generally they are approved to be mounted on 8.5-10β€³ wide wheels.

255/40R18
Diameter : 26.0β€³
Width : 10.0β€³
Wheel : 18β€³ x 8.5-10β€³
Sidewall : 4.0β€³
Circum. : 81.7β€³
Revs/Mile : 775