24540-R20 tires are 1.04 inches (26.3 mm) larger in diameter than 245/45-R18 tires and the speedometer difference is 3.8%.
Thecalculation results are presented in the form of visual infographics, on which tire with size 245/60 R18 is on top, and tire with size 265/60 R18 below. Both in the table and in the graph, the tires are compared

Sizedifference between 245/40 R18 and 245/45 R17 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 245/40 R18 and 245/45 R17 tire. The calculation results are presented in the form of visual infographics, on which tire with size 245/40 R18 is on top, and tire with size 245/45 R17 below.

5861 Better Fuel Economy Factory Ratios Increased Power. 245/40-R19 tires are 1 inch (25.4 mm) larger in diameter than 245/40-R18 tires and the speedometer difference is 3.8%. BetterFuel Economy Factory Ratios Increased Power. vs 275/35-19 vs 255/40-19 vs 255/35-19. 245/45-R18 tires are 0.04 inches (0.9 mm) smaller in diameter than 245/40-R19 tires and the speedometer difference is 0.2%.

BetterFuel Economy Factory Ratios Increased Power. vs 235/60-18 vs 235/55-18. 255/55-R18 tires are 0.43 inches (11 mm) larger in diameter than 245/55-R18 tires and the speedometer difference is 1.5%.

Calculate 225/40 R18 vs 225/45 R18 comparison results: Speedometer difference. Welcome to our handy wheel and tire size calculator! Put your current tire size (width, 24545-R18 tires are 0.81 inches (20.5 mm) larger in diameter than 250/40-R18 tires and the speedometer difference is 3.0%.
BetterFuel Economy Factory Ratios Increased Power. vs 235/50-18 vs 275/40-18. 245/60-R18 tires are 2.89 inches (73.5 mm) larger in diameter than 245/45-R18 tires and the speedometer difference is 9.8%.
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    • 245 45 r18 vs 245 40 r18