Inthe tire comparison table above, you can see a detailed calculation of the size difference between 215/45 R17 and 235/45 R17 tire. The calculation results are presented in the form of visual infographics, on which tire with size 215/45 R17 is on top, and tire with size 235/45 R17 below. Both in the table and in the graph, the tires are 22545-R17 tires are 1.2 inches (30.5 mm) larger in diameter than 215/40-R17 tires and the speedometer difference is 4.8%. 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 245/45 R17 and tire 245/50 R17 is significant. Compare225/50 R16 vs 215/45 R17. So, the sidewall height of a 225/50 R 16 tire is 60% of 225 = 192. The 3rd number 16 (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 ContinentalContiProContact tire pressure chart has a total of 87 tire sizes with a maximum tire inflation range of 44 to 51 psi and a maximum tire load capacity range of 1048 to 909 pounds. Select Continental ContiProContact tire size to locate its greatest tire load limit at its predetermined tire inflation. Tire load limit and tire inflation 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 225/50 R17 and tire 225/45 R18 is significant. 22545-R17 tires are 1.52 inches (38.5 mm) larger in diameter than 205/40-R17 tires and the speedometer difference is 6.1%. Boughtthese 225/45R17 on my BMW 328ci e46. Its european winter tyre, so don't expect much on snow and ice, expecially if you have rear wheel drive, but perfect for city and roadway. (215/45 R18) on a combination of roads for 4,000 spirited miles I was sceptical of Nexen at first. (225/50 R17) on a combination of roads for 5,000 average Thecalculation results are presented in the form of visual infographics, on which tire with size 235/45 R17 is on top, and tire with size 225/50 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. 22545R17's would definitely handle better than 215/50R17's since they are wider & lower profile (0.5" less in diameter) but 225's are really too wide for the TSX stock wheel 17x7. I went 225/50R17's which OEIL9eq.