Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/45r17 vs 205/50r17 Tire Comparison Side By Side
  215/45-17 205/50-17 Difference
Diameter inches (mm) 24.62 (625.3) 25.07 (636.8) 0.45 (11.5) 1.8%
Width inches (mm) 8.46 (215) 8.07 (205) -0.39 (-10) -4.7%
Circum. inches (mm) 77.34 (1964.44) 78.76 (2000.57) 1.42 (36.13) 1.8%
Sidewall Height inches (mm) 3.81 (96.75) 4.04 (102.5) 0.23 (5.75) 5.9%
Revolutions per mile (km) 819.24 (509.05) 804.44 (499.86) -14.79 (-9.19) -1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.37 mph (32.78 km/h)
25 mph (40.23 km/h)25.46 mph (40.97 km/h)
30 mph (48.28 km/h)30.55 mph (49.17 km/h)
35 mph (56.33 km/h)35.64 mph (57.36 km/h)
40 mph (64.37 km/h)40.74 mph (65.56 km/h)
45 mph (72.42 km/h)45.83 mph (73.75 km/h)
50 mph (80.47 km/h)50.92 mph (81.95 km/h)
55 mph (88.51 km/h)56.01 mph (90.14 km/h)
60 mph (96.56 km/h)61.1 mph (98.34 km/h)
65 mph (104.61 km/h)66.2 mph (106.53 km/h)
70 mph (112.65 km/h)71.29 mph (114.73 km/h)
75 mph (120.7 km/h)76.38 mph (122.92 km/h)
80 mph (128.75 km/h)81.47 mph (131.12 km/h)
85 mph (136.79 km/h)86.56 mph (139.31 km/h)
90 mph (144.84 km/h)91.66 mph (147.51 km/h)
95 mph (152.89 km/h)96.75 mph (155.7 km/h)
100 mph (160.93 km/h)101.84 mph (163.89 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
20472378256126742796288329793093324934063580372039724251446946084687497453756246
Better Fuel Economy Factory Ratios Increased Power

Most Popular 215/45-R17 Comparisons

To Top