225vs 245 tires: So when someone mentioned their tire size is 225/45 R17, what does this actually mean? 225 actually denotes the width of the tires in mm. For example a 225/45R17 tire size, it means that the width of the tire is 225mm (~ 8.9 inch) wide. The picture below shows an illustration of the 225mm length tire width. For215 tires, the recommended rim width range is between 6 and 7.5 inches, while for 225 tires, it’s between 7 and 8 inches. Given this overlap, 215 and 225 tires can be interchangeable, provided the vehicle’s rims fall within the appropriate range for the 225 tire size. It’s crucial, however, to be aware that changing tire sizes can Thecalculation results are presented in the form of visual infographics, on which tire with size 225/60 R17 is on top, and tire with size 225/45 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. 22545-R17 tires are 0.35 inches (9 mm) smaller in diameter than 235/45-R17 tires and the speedometer difference is 1.4%. 22545-R17 tires are 1.19 inches (30.1 mm) smaller in diameter than 215/60-R16 tires and the speedometer difference is 4.6%. Sizedifference between 245/45 R17 and 245/50 R17 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 245/45 R17 and 245/50 R17 tire. 225/55 R16: 225/55 R17: 245/40 R18: Sizes often compared to the 245/50 R17 tire: 225/55 R17: 225/50 R17: 215/55 R17: 245/45 R18: 265/40 R18: Binty15 May 2021 08:32 3. Mmm, nor sure the maths is right. 205/45 have a sidewall of 92.25mm (45% of 205mm) 215/40 have a sidewall of 86mm (40% of 215mm) Overall they are smaller but wider. 1 Like. vindaloo 15 May 2021 08:45 4. The OP is referring to 215/40 but I think 999to5 is referring to 215/45. I would definitely not want a lower profile Thefirst number 215 is the tire width in millimeters. The 2nd number 45 is used to calculate the sidewall height or "aspect ratio", by percentage. So, the sidewall height of a 215/45 R 17 tire is 60% of 215 = 192. The 3rd number 17 (generally preceded by an "R") is Rim Diameter in inches. This is the diameter of the rims bead seat base, not fYBGM.

215 40 r17 vs 225 45r17