23540-R19 tires are 0.28 inches (7.1 mm) smaller in diameter than 245/45-R18 tires and the speedometer difference is 1.1%
The2nd number 50 is used to calculate the sidewall height or "aspect ratio", by percentage. So, the sidewall height of a 245/50 R 20 tire is 60% of 245 = 192. The 3rd number 20 (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.
27540-R18 tires are 0.02 inches (0.5 mm) smaller in diameter than 245/45-R18 tires and the speedometer difference is 0.1%.
Tire1. / R. 235. 45. R 18. Tire 2. / R. 225. 40. R 18. Inch Mill. KPH MPH. Odometer Reading. If you replace 320/60/18 with 235/60/18 for Odometer reading 1000 the actual distance
Thecalculation results are presented in the form of visual infographics, on which tire with size 235/55 R18 is on top, and tire with size 245/60 R18 below. 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.
Inthis case, the 235/40r18 tire has an aspect ratio of 40%, while the 235/45r18 tire has an aspect ratio of 45%. This means the 235/45r18 tire has a taller sidewall than the 235/40r18 tire. 235/45r18 vs 235/40r18 This table provides a quick overview of the main differences between the two sizes. Fitment Guide. The 235/45R18 is 3.6% larger in