Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/82r15 vs 205/35r20 Tire Comparison Side By Side
  165/82-15 205/35-20 Difference
Diameter inches (mm) 25.65 (651.6) 25.65 (651.5) -0 (-0.1) -0%
Width inches (mm) 6.5 (165) 8.07 (205) 1.57 (40) 24.2%
Circum. inches (mm) 80.59 (2047.06) 80.58 (2046.75) -0.01 (-0.31) -0%
Sidewall Height inches (mm) 5.33 (135.3) 2.82 (71.75) -2.5 (-63.55) -47%
Revolutions per mile (km) 786.17 (488.5) 786.29 (488.58) 0.12 (0.07) 0%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20 mph (32.18 km/h)
25 mph (40.23 km/h)25 mph (40.23 km/h)
30 mph (48.28 km/h)30 mph (48.27 km/h)
35 mph (56.33 km/h)34.99 mph (56.32 km/h)
40 mph (64.37 km/h)39.99 mph (64.36 km/h)
45 mph (72.42 km/h)44.99 mph (72.41 km/h)
50 mph (80.47 km/h)49.99 mph (80.46 km/h)
55 mph (88.51 km/h)54.99 mph (88.5 km/h)
60 mph (96.56 km/h)59.99 mph (96.55 km/h)
65 mph (104.61 km/h)64.99 mph (104.59 km/h)
70 mph (112.65 km/h)69.99 mph (112.64 km/h)
75 mph (120.7 km/h)74.99 mph (120.68 km/h)
80 mph (128.75 km/h)79.99 mph (128.73 km/h)
85 mph (136.79 km/h)84.99 mph (136.77 km/h)
90 mph (144.84 km/h)89.99 mph (144.82 km/h)
95 mph (152.89 km/h)94.99 mph (152.86 km/h)
100 mph (160.93 km/h)99.98 mph (160.91 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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