Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
365/75r16 vs 285/75r16 Tire Comparison Side By Side
  365/75-16 285/75-16 Difference
Diameter inches (mm) 37.56 (953.9) 32.83 (833.9) -4.72 (-120) -12.6%
Width inches (mm) 14.37 (365) 11.22 (285) -3.15 (-80) -21.9%
Circum. inches (mm) 117.98 (2996.77) 103.14 (2619.77) -14.84 (-376.99) -12.6%
Sidewall Height inches (mm) 10.78 (273.75) 8.42 (213.75) -2.36 (-60) -21.9%
Revolutions per mile (km) 537.03 (333.69) 614.31 (381.71) 77.28 (48.02) 14.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.48 mph (28.14 km/h)
25 mph (40.23 km/h)21.86 mph (35.17 km/h)
30 mph (48.28 km/h)26.23 mph (42.21 km/h)
35 mph (56.33 km/h)30.6 mph (49.24 km/h)
40 mph (64.37 km/h)34.97 mph (56.28 km/h)
45 mph (72.42 km/h)39.34 mph (63.31 km/h)
50 mph (80.47 km/h)43.71 mph (70.34 km/h)
55 mph (88.51 km/h)48.08 mph (77.38 km/h)
60 mph (96.56 km/h)52.45 mph (84.41 km/h)
65 mph (104.61 km/h)56.82 mph (91.45 km/h)
70 mph (112.65 km/h)61.19 mph (98.48 km/h)
75 mph (120.7 km/h)65.57 mph (105.52 km/h)
80 mph (128.75 km/h)69.94 mph (112.55 km/h)
85 mph (136.79 km/h)74.31 mph (119.59 km/h)
90 mph (144.84 km/h)78.68 mph (126.62 km/h)
95 mph (152.89 km/h)83.05 mph (133.65 km/h)
100 mph (160.93 km/h)87.42 mph (140.69 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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