Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/35r17 vs 205/45r17 Tire Comparison Side By Side
  215/35-17 205/45-17 Difference
Diameter inches (mm) 22.93 (582.3) 24.26 (616.3) 1.34 (34) 5.8%
Width inches (mm) 8.46 (215) 8.07 (205) -0.39 (-10) -4.7%
Circum. inches (mm) 72.02 (1829.35) 76.23 (1936.16) 4.21 (106.81) 5.8%
Sidewall Height inches (mm) 2.96 (75.25) 3.63 (92.25) 0.67 (17) 22.6%
Revolutions per mile (km) 879.74 (546.64) 831.2 (516.48) -48.53 (-30.16) -5.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.17 mph (34.07 km/h)
25 mph (40.23 km/h)26.46 mph (42.58 km/h)
30 mph (48.28 km/h)31.75 mph (51.1 km/h)
35 mph (56.33 km/h)37.04 mph (59.62 km/h)
40 mph (64.37 km/h)42.34 mph (68.13 km/h)
45 mph (72.42 km/h)47.63 mph (76.65 km/h)
50 mph (80.47 km/h)52.92 mph (85.17 km/h)
55 mph (88.51 km/h)58.21 mph (93.68 km/h)
60 mph (96.56 km/h)63.5 mph (102.2 km/h)
65 mph (104.61 km/h)68.8 mph (110.72 km/h)
70 mph (112.65 km/h)74.09 mph (119.23 km/h)
75 mph (120.7 km/h)79.38 mph (127.75 km/h)
80 mph (128.75 km/h)84.67 mph (136.27 km/h)
85 mph (136.79 km/h)89.96 mph (144.78 km/h)
90 mph (144.84 km/h)95.26 mph (153.3 km/h)
95 mph (152.89 km/h)100.55 mph (161.81 km/h)
100 mph (160.93 km/h)105.84 mph (170.33 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
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