Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/70r20 vs 295/65r20 Tire Comparison Side By Side
  295/70-20 295/65-20 Difference
Diameter inches (mm) 36.26 (921) 35.1 (891.5) -1.16 (-29.5) -3.2%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 113.91 (2893.41) 110.26 (2800.73) -3.65 (-92.68) -3.2%
Sidewall Height inches (mm) 8.13 (206.5) 7.55 (191.75) -0.58 (-14.75) -7.1%
Revolutions per mile (km) 556.21 (345.61) 574.62 (357.05) 18.41 (11.44) 3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.36 mph (31.16 km/h)
25 mph (40.23 km/h)24.2 mph (38.94 km/h)
30 mph (48.28 km/h)29.04 mph (46.73 km/h)
35 mph (56.33 km/h)33.88 mph (54.52 km/h)
40 mph (64.37 km/h)38.72 mph (62.31 km/h)
45 mph (72.42 km/h)43.56 mph (70.1 km/h)
50 mph (80.47 km/h)48.4 mph (77.89 km/h)
55 mph (88.51 km/h)53.24 mph (85.68 km/h)
60 mph (96.56 km/h)58.08 mph (93.47 km/h)
65 mph (104.61 km/h)62.92 mph (101.26 km/h)
70 mph (112.65 km/h)67.76 mph (109.05 km/h)
75 mph (120.7 km/h)72.6 mph (116.83 km/h)
80 mph (128.75 km/h)77.44 mph (124.62 km/h)
85 mph (136.79 km/h)82.28 mph (132.41 km/h)
90 mph (144.84 km/h)87.12 mph (140.2 km/h)
95 mph (152.89 km/h)91.96 mph (147.99 km/h)
100 mph (160.93 km/h)96.8 mph (155.78 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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