Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
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365/65r22.5 vs 335/80r20 Tire Comparison Side By Side
  365/65-22.5 335/80-20 Difference
Diameter inches (mm) 41.18 (1046) 41.1 (1044) -0.08 (-2) -0.2%
Width inches (mm) 14.37 (365) 13.19 (335) -1.18 (-30) -8.2%
Circum. inches (mm) 129.37 (3286.11) 129.13 (3279.82) -0.25 (-6.28) -0.2%
Sidewall Height inches (mm) 9.34 (237.25) 10.55 (268) 1.21 (30.75) 13%
Revolutions per mile (km) 489.74 (304.31) 490.68 (304.89) 0.94 (0.58) 0.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.96 mph (32.13 km/h)
25 mph (40.23 km/h)24.95 mph (40.16 km/h)
30 mph (48.28 km/h)29.94 mph (48.19 km/h)
35 mph (56.33 km/h)34.93 mph (56.22 km/h)
40 mph (64.37 km/h)39.92 mph (64.25 km/h)
45 mph (72.42 km/h)44.91 mph (72.28 km/h)
50 mph (80.47 km/h)49.9 mph (80.31 km/h)
55 mph (88.51 km/h)54.89 mph (88.34 km/h)
60 mph (96.56 km/h)59.89 mph (96.38 km/h)
65 mph (104.61 km/h)64.88 mph (104.41 km/h)
70 mph (112.65 km/h)69.87 mph (112.44 km/h)
75 mph (120.7 km/h)74.86 mph (120.47 km/h)
80 mph (128.75 km/h)79.85 mph (128.5 km/h)
85 mph (136.79 km/h)84.84 mph (136.53 km/h)
90 mph (144.84 km/h)89.83 mph (144.56 km/h)
95 mph (152.89 km/h)94.82 mph (152.6 km/h)
100 mph (160.93 km/h)99.81 mph (160.63 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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