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%.

24550-R18 tires are 1.93 inches (49 mm) larger in diameter than 245/40-R18 tires and the speedometer difference is 7.0%.

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24560-R18 tires are 0.96 inches (24.5 mm) larger in diameter than 245/55-R18 tires and the speedometer difference is 3.2%.

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. Sizedifference between 245/45 R18 and 245/40 R19 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 245/45 R18 . 621 315 551 513 397 32 755 884

245 45 r18 vs 245 40 r18