This is denoted by a LI symbol (Load Index). You should permanently mount the tires with the speed index approved by the manufacturer. The speed index is indicated by letters, e.g. If this is exceeded, the tires are dangerous to use. This is the maximum speed at which you can drive the tires. The third value (14) indicates the diameter of the rim in inches.R means radial tires, the most common form of tires today.The sidewall height is the tire thickness, the distance between the rim's outer edge and the tire's outer edge.The second value (75) indicates the ratio of the sidewall height to tire width in percent.
#Wheel tire size comparison professional
You should generally seek professional advice when looking for an alternative tire. Conversely, the 185/80 R13 models can't replace 225/40 R18 tires.Due to the size of the brake discs, it is impossible to replace the 225/40 R 18 tires with the 185/80 R13 tires mounted on 18-inch rims.When using the tire circumference calculator, please remember that the model and brand of the respective car are not considered.This tool is here to provide you with the necessary information, but it must be used with caution Proceed to the “Tire 2” and fill in the corresponding fields for your alternative size tires.Note that they must be within recommended limits or otherwise, the calculator will not give you an accurate result. Go to the “Tire 1” and enter the tire width in millimeters, the aspect ratio ( the ratio of tire height to tire width), and the rim diameter of your current tires.To get an accurate difference between your original tires and alternative size tires you should do this: Speedo Difference between Wheels 12.1% 320/60 R 18 KPH The outer rim edge diameter will actually measure more, depending on the design. Mean that the diameter of the bead seat base measures 18 inches. When we say a rim has a 18 inch diameter, we The rim edge, or lip, extends past the tire bead seat to hold the bead and stop the tire This is the diameter of the rims bead seat base, not the diameter of the The 3rd number 18 (generally preceded by an So, the sidewall height of a 320/60 R 18 tire is 60% of 320 = 192 Sidewall height or "aspect ratio", by percentage. The 2nd number 60 is used to calculate the The first number (265) is the tire width in millimeters. Just enter the original tire size you see on the sidewall and compare it to the desired tire size alternative. This tool combines features of a tire size calculator with an easy way to compare speedometer differences for tire sizes. Tire Size Calculator - Compare & Visualize Alternate Tire Options
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