ComparisonTable. Model. 235/45 R18. 235/40 R19. Section Width. i. 235 mm. Sidewall Height. i. 4.16" 3.7" Bothsizes suit most vehicles well visually. Handling & Stability. The 225/45r18’s taller sidewall promotes more flex, reducing handling precision slightly compared to the Thedifference in sizes and parameters between the 225/40 R18 tire and 235/45 R18 tire. Detailed calculations and graphics. Thecalculation results are presented in the form of visual infographics, on which tire with size 225/45 R18 is on top, and tire with size 225/40 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. Thedifference in sizes and parameters between the 275/35 R18 tire and 275/40 R18 tire. Detailed calculations and graphics. Calculate the difference in inches. Tire calculator online . Top comparisons; 255/45 R18: 245/40 R18: 265/40 R18: 235/45 R18: 245/45 R17: Thecalculation results are presented in the form of visual infographics, on which tire with size 235/65 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. 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 24545-R18 tires are 0.57 inches (14.5 mm) smaller in diameter than 235/50-R18 tires and the speedometer difference is 2.1%. 24545-R20 tires are 0.5 inches (12.8 mm) larger in diameter than 235/55-R18 tires and the speedometer difference is 1.8%. Thecalculation results are presented in the form of visual infographics, on which tire with size 265/40 R18 is on top, and tire with size 245/40 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. eV8V.