The first number 215 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 215/55 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 180/55-R17 tires are 0.24 inches (6 mm) larger in diameter than 160/60-R17 tires and the speedometer difference is 0.9%. 130/55-R18 tires are 0.73 inches (18.6 mm) smaller in diameter than 170/55-R17 tires and the speedometer difference is 3.0% Dec 2, 2004 · #1 · Sep 13, 2004 I checked and Bridgestone, Dunlop, and Avon all say that for a 5 in rim the 170/60/17 is the best size for the rims the Z has, eventhough the 160 is what it came with. Well I ride in the mountains, and treat my Z like a sportbike. I noticed I had NO chicken marks on the rear Dunlop 205 in size 160, which made me nervious. Feb 19, 2007 · 558 posts · Joined 2004. #2 · Feb 19, 2007. 180 turn in slower. because the 10 has a wider wheel than the 5.5 the tires made for. So the tire flattens out. but if you have a 5.5 wheel, yes it will. The 190/55 will turn quiker than the 50 and give better in turn traction while the 190/50 would be better in a drag race. vs. Continental WinterContact TS 870. 225/65 R17 Autobild 2023; 235/60 R18 Tyre Reviews 2023; 255/45 R20 Automotorsport 2023; Better Fuel Economy Factory Ratios Increased Power. vs 180/55-17. 170/50-R17 tires are 0.67 inches (17 mm) smaller in diameter than 170/55-R17 tires and the speedometer difference is 2.8%. 235/55-R17 tires are 1.34 inches (34 mm) smaller in diameter than 225/65-R17 tires and the speedometer difference is 4.7%. 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 17 tire is 60% of 235 = 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 In the tire comparison table above, you can see a detailed calculation of the size difference between 235/55 R17 and 235/60 R17 tire. The calculation results are presented in the form of visual infographics, on which tire with size 235/55 R17 is on top, and tire with size 235/60 R17 below. Both in the table and in the graph, the tires are mwHhxb.

170 60 r17 vs 180 55r17