The calculation results are presented in the form of visual infographics, on which tire with size 225/60 R18 is on top, and tire with size 225/65 R17 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. 265/60-R18 tires are 1.49 inches (37.9 mm) larger in diameter than 235/65-R17 tires and the speedometer difference is 4.9% 245/60-R18 tires are 0.55 inches (13.9 mm) larger in diameter than 235/65-R17 tires and the speedometer difference is 1.9% Better Fuel Economy Factory Ratios Increased Power. vs 235/60-18 vs 265/60-18 vs 255/60-18 vs 235/65-18 vs 255/55-18 vs 255/65-18. 235/55-R17 tires are 2.4 inches (60.9 mm) smaller in diameter than 245/60-R18 tires and the speedometer difference is 8.1%. Michelin PILOT ALPIN 5 SUV belongs to the Premium segment and is made by a manufacturer from France. It is made in total of 105 sizes, 225/60 R17 being the smallest and 315/30 R23 the largest. This tyre was featured in tests 6 times, first test was carried in 2021. This model received the best possible rating in 5 tests. In the tire comparison table above, you can see a detailed calculation of the size difference between 235/60 R18 and 225/60 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 235/60 R18 is on top, and tire with size 225/60 R18 below. Both in the table and in the graph, the tires are Tire size comparison in inches 235/60 R18 vs 235/65 R17 Calculate CM INCHES If your speedometer reads: Real speed is: Size difference between 235/60 R18 and 235/65 R17 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 235/60 R18 and 235/65 R17 tire. 215/60-R17 tires are 0.09 inches (2.4 mm) smaller in diameter than 235/50-R18 tires and the speedometer difference is 0.4% In the tire comparison table above, you can see a detailed calculation of the size difference between 235/60 R18 and 245/45 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 235/60 R18 is on top, and tire with size 245/45 R18 below. Both in the table and in the graph, the tires are So, the sidewall height of a 255/60 R 18 tire is 60% of 255 = 192. The 3rd number 18 (generally preceded by an "R") is Rim Diameter in inches. This is the diameter of the rims bead seat base, not the diameter of the outer rim edge. The rim edge, or lip, extends past the tire bead seat to hold the bead and stop the tire slipping off the rim. yUV1.