245/40-R19 tires are 0.86 inches (21.8 mm) larger in diameter than 225/50-R17 tires and the speedometer difference is 3.2% Sep 25, 2015 · When it's time to replace them, 225/50-17 is the correct choice. 235/45-17 is some 2% smaller but I wouldn't throw away good tyres for it. Your speedometer will show some 4% too high (instead of typically 2%) and ground clearance is reduced about 7mm. (So about the same as thread depth of new tyres.) 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 225/45 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. Tire size comparison in inches 225/45 R17 vs 245/40 R17 Calculate CM INCHES If your speedometer reads: Real speed is: Size difference between 225/45 R17 and 245/40 R17 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 225/45 R17 and 245/40 R17 tire. Michelin Pilot HX MXM4. 225/45-R17. $167 each. Bridgestone Potenza RE92. 225/45-R17. $299 each. See All 225/45-17 Tires (125) Tire Pressure Chalk Test. Understanding metric sizes. 225/50-R17 tires are 1.14 inches (29 mm) larger in diameter than 245/40-R17 tires and the speedometer difference is 4.4%. 0D4GD2.

245 40 r17 vs 225 45 r17