245/60-R18 tires are 0.07 inches (1.8 mm) smaller in diameter than 245/50-R20 tires and the speedometer difference is 0.3%.

In the tire comparison table above, you can see a detailed calculation of the size difference between 245/65 R17 and 235/65 R17 tire. The calculation results are presented in the form of visual infographics, on which tire with size 245/65 R17 is on top, and tire with size 235/65 R17 below. Both in the table and in the graph, the tires are

Both in the table and in the graph, the tires are compared according to the following indicators: overall diameter, section width, circumference, sidewall height and clearance. Also, the online application calculates the difference in real speed and speedometer readings if the difference between tire 215/55 R17 and tire 245/55 R17 is significant.
265/70-R16 tires are 1.04 inches (26.5 mm) smaller in diameter than 265/75-R16 tires and the speedometer difference is 3.3%.
Tire Size Vs. Gas Mileage. Changing the diameter of a vehicle's tire can drastically affect every aspect of its performance, from acceleration, to braking, to fuel economy. From one extreme to the next, a vehicle can gain or loose as much as 25 percent of its fuel economy, just by changing tire diameter. There are a number of factors that can
Both in the table and in the graph, the tires are compared according to the following indicators: overall diameter, section width, circumference, sidewall height and clearance. Also, the online application calculates the difference in real speed and speedometer readings if the difference between tire 285/75 R16 and tire 265/75 R16 is significant. oGPOum. 933 803 889 416 33 620 876 726

difference between 265 and 245 tires