In summary, a P255/45R18 103H tire would be a passenger tire with a width of 255 millimeters, a thickness or aspect ratio equal to 45% of the tire height which here is 114 millimeters. It is also a radially constructed tire with a diameter of 18 inches that can carry up to 1,929 pounds and can go up to 130 mph.14 jun 2021
What size tire is 285 70R18?
285/70R18 tires have a diameter of 33.7", a section width of 11.2", and a wheel diameter of 18". The circumference is 105.8" and they have 599 revolutions per mile.