Thefirst number 235 is the tire width in millimeters. The 2nd number 55 is used to calculate the sidewall height or "aspect ratio", by percentage. So, the sidewall height of a 235/55 R 18 tire is 60% of 235 = 192. The 3rd number 18 (generally
Witha diameter of 25.72 inches, the 245/40R18 provides 0.31 inches (8mm) more ground clearance than the 235/40R18 at 25.4 inches. This extra clearance is useful for off-road driving over obstacles and rough terrain. However, the larger 245/40R18 diameter causes a slightly lower speedometer reading than the 235/40R18 one.
Compare235/55 R18 vs 215/45 R17. Tire Size and Comparison Calculator calculate tire diameter from code and compare speedometer differences for tire sizes. The first number 235 is the tire width in millimeters. The 2nd number 55 is used to calculate the sidewall height or "aspect ratio", by percentage.
The2nd number 50 is used to calculate the sidewall height or "aspect ratio", by percentage. So, the sidewall height of a 235/50 R 18 tire is 60% of 235 = 192. The 3rd number 18 (generally preceded by an "R") is Rim Diameter in inches. This is the diameter of the rims bead seat base, not the diameter of the outer rim edge.
Thecalculation results are presented in the form of visual infographics, on which tire with size 225/60 R18 is on top, and tire with size 235/55 R18 below. Both in the table and in the graph, the tires are compared
Sizedifference between 225/45 R18 and 235/60 R18 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 225/45 R18 and 235/60 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 225/45 R18 is on top, and tire with size 235/60 R18 below.
bM3ab.