22545-R18 tires are 2.54 inches (64.6 mm) smaller in diameter than 225/65-R17 tires and the speedometer difference is 8.9%. Compare235/45 R18 vs 225/40 R18. Tire Size and Comparison Calculator calculate tire diameter from code and compare speedometer differences for tire sizes. The first number 22540-R18 vs 225/40-R18 Tire Comparison - Tire Size Calculator | Tacoma World. Continental ExtremeContact DWS. 225/40Z-R18. $148 each. Michelin Pilot Sport PS2. 225/40Z-R18. $230 each. See All 225/40-18 Tires (99) Tire Pressure Chalk Test. 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 255/40 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. 22550-R18 tires are 0.89 inches (22.5 mm) larger in diameter than 225/45-R18 tires and the speedometer difference is 3.3%. 22555-R18 tires are 2.03 inches (51.5 mm) larger in diameter than 245/40-R18 tires and the speedometer difference is 7.3%. 22560-R18 tires are 1.77 inches (45 mm) larger in diameter than 225/50-R18 tires and the speedometer difference is 6.2%. 23540-R18 tires are 0.43 inches (10.9 mm) larger in diameter than 225/45-R17 tires and the speedometer difference is 1.7%. .

225 45 r18 vs 225 40 r18