Tire size comparison in inches 185/55 R15 vs 195/55 R15 Calculate CM INCHES If your speedometer reads: Real speed is: Size difference between 185/55 R15 and 195/55 R15 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 185/55 R15 and 195/55 R15 tire. .

difference between 195 50 r15 and 195 55 r15