Inthe tire comparison table above, you can see a detailed calculation of the size difference between 235/40 R18 and 225/45 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 235/40 R18 is on top, and tire with size 225/45 R18 below. Both in the table and in the graph, the tires are22555-R18 tires are 1.7 inches (43.3 mm) larger in diameter than 255/50-R16 tires and the speedometer difference is 6.1%. Bothin 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 225/60 R18 and tire 225/65 R17 is significant. 22555-R19 tires are 0.11 inches (2.9 mm) larger in diameter than 225/60-R18 tires and the speedometer difference is 0.4%.
TireSize and Comparison Calculator calculate tire diameter from code and compare speedometer differences for tire sizes. The first number 235 is the tire width in millimeters. The 2nd number 55 is used to calculate the sidewall height or "aspect ratio", by percentage. So, the sidewall height of a 235/55 R 19 tire is 60% of 235 = 192.
6lan. 225 50 r18 vs 225 55 r18
