245 vs 255 Tires The main difference between a 245 tire and a 255 tire is the tread width, with the 255 tire being 10mm (or about 0.4 inches) wider than the 245 tire. This slightly wider tread provides more grip and stability, especially in adverse conditions, but the difference is quite minor. 245 vs 255 Tires
The diameter of a 245/75R16 is about 30.46 inches, while the diameter of a 265/75R16 is around 31.64 inches (a 1.18 inch difference). The change in diameter changes the circumference, which in turn changes the revolutions per mile. This difference in circumference will affect your speedometer by about 3.9%.
265/60-R18 tires are 0.47 inches (12 mm) larger in diameter than 255/60-R18 tires and the speedometer difference is 1.5%.
As we can see from the comparison table above, both tire shares several differences in some criteria. Firstly, 265 70r16 and 245 75r16 share 0.5% differences in terms of Diameter. Secondly, in circumstances, the tires have 0.5% differences. Thirdly, in sidewall height, they have 1% differences. The major difference is in width, and it is 8.2%.
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 245/60 R18 and tire 265/65 R18 is significant.
The difference in diameter will give you the factor to multiply your odometer reading by when you check your gas mileage. I.e., factory 265/65/17 vs aftermarket 265/70/17 is a difference of + 3.4%. Multiply that (1.034) by your odometer reading and you get your actual mileage traveled.
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difference between 265 and 245 tires
