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 255/45 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. 225/45-R17 tires are 0.2 inches (5.1 mm) larger in diameter than 215/40-R18 tires and the speedometer difference is 0.8% Aug 21, 2016 · The Nankang Noble Sport NS20 is a High Performance Summer tyre designed to be fitted to Passenger Cars. This tyre replaced the Nankang NS2. Dry Grip 73%. Wet Grip 58%. Road Feedback 66%. Handling 60%. Wear 77%. Comfort 72%. Buy again 60%. Compare 225/45 R17 vs 225/50 R17. Tire Size and Comparison Calculator calculate tire diameter from code and compare speedometer differences for tire sizes. The first number 225 is the tire width in millimeters. The 2nd number 45 is used to calculate the sidewall height or "aspect ratio", by percentage. 215/45-R17 tires are 0.15 inches (3.9 mm) smaller in diameter than 215/40-R18 tires and the speedometer difference is 0.6%. 215/40-R17 tires are 0.31 inches (8 mm) larger in diameter than 205/40-R17 tires and the speedometer difference is 1.3%. .

215 40 r17 vs 225 45r17