225/45-R17 tires are 0.35 inches (9 mm) larger in diameter than 215/45-R17 tires and the speedometer difference is 1.4%. 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. Also, the online application calculates the difference in real speed and speedometer readings if the difference between tire 225/55 R17 and tire 225/50 R17 is significant. 9FNYni.