The225/45R18 tire has the following features: the first three digits 225 refer to the width of the tire in millimetres. The second two-digit number 45 refers to the ratio between the height of the sidewall and the width of the tire. R stands for “Radial” and the last two figures 18 indicate the wheel diameter in inches. Inthe tire comparison table above, you can see a detailed calculation of the size difference between 225/45 R18 and 255/55 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 225/45 R18 is on top, and tire with size 255/55 R18 below. Both in the table and in the graph, the tires are 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 50 is used to calculate the sidewall height or "aspect ratio", by percentage. So, the sidewall height of a 235/50 R 18 tire is 60% of 235 = 192. Inthe tire comparison table above, you can see a detailed calculation of the size difference between 275/40 R18 and 245/45 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 275/40 R18 is on top, and tire with size 245/45 R18 below. Both in the table and in the graph, the tires are Curmudgeonsaid: For the record, the difference in circum. between the 215/40 and 225/45 is 3.77 inches, not 2 1/2 inches; there is only 0.99" difference 21545/r18 vs 225/45/r18. Advice Request. Hi guys, its near time for me to change my T005 on 4th gen Mazda 3 sedan, would like to ask. as many tyre shops near me do not have 215/45r18 or its 25USD more expensive per dough and they recommend me go for 225/45/r18 instead. Any experience that this profile of 225/45/r18 makes driving tad better? hHPVKou. Sizedifference between 215/60 R17 and 225/55 R18 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 215/60 R17 and 225/55 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 215/60 R17 is on top, and tire with size 225/55 R18 below. Thewheel diameter is R18, which means it fits to a 18 inch/457.2mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 245/40 R20 (2211.68 mm), Inthe tire comparison table above, you can see a detailed calculation of the size difference between 225/45 R19 and 245/55 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 225/45 R19 is on top, and tire with size 245/55 R18 below. Both in the table and in the graph, the tires are Tools& Tech: 215-45R18 tire size comparison with Size calculator. Use our tire calculator to compare tire sizes based on tire diameter, radius, sidewall height, circumference, revs per mile and speedometer difference. 21550-R17 tires are 0.51 inches (12.9 mm) smaller in diameter than 225/45-R18 tires and the speedometer difference is 2.0%. Inthe tire comparison table above, you can see a detailed calculation of the size difference between 225/50 R17 and 245/40 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 225/50 R17 is on top, and tire with size 245/40 R18 below. Both in the table and in the graph, the tires are

215 45 r18 vs 225 40 r18