Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
240/40r19 vs 225/35r17 Tire Comparison Side By Side
  240/40-19 225/35-17 Difference
Diameter inches (mm) 26.56 (674.6) 23.2 (589.3) -3.36 (-85.3) -12.6%
Width inches (mm) 9.45 (240) 8.86 (225) -0.59 (-15) -6.3%
Circum. inches (mm) 83.44 (2119.32) 72.89 (1851.34) -10.55 (-267.98) -12.6%
Sidewall Height inches (mm) 3.78 (96) 3.1 (78.75) -0.68 (-17.25) -18%
Revolutions per mile (km) 759.37 (471.85) 869.29 (540.15) 109.92 (68.3) 14.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.47 mph (28.12 km/h)
25 mph (40.23 km/h)21.84 mph (35.15 km/h)
30 mph (48.28 km/h)26.21 mph (42.18 km/h)
35 mph (56.33 km/h)30.57 mph (49.2 km/h)
40 mph (64.37 km/h)34.94 mph (56.23 km/h)
45 mph (72.42 km/h)39.31 mph (63.26 km/h)
50 mph (80.47 km/h)43.68 mph (70.29 km/h)
55 mph (88.51 km/h)48.05 mph (77.32 km/h)
60 mph (96.56 km/h)52.41 mph (84.35 km/h)
65 mph (104.61 km/h)56.78 mph (91.38 km/h)
70 mph (112.65 km/h)61.15 mph (98.41 km/h)
75 mph (120.7 km/h)65.52 mph (105.44 km/h)
80 mph (128.75 km/h)69.88 mph (112.47 km/h)
85 mph (136.79 km/h)74.25 mph (119.5 km/h)
90 mph (144.84 km/h)78.62 mph (126.53 km/h)
95 mph (152.89 km/h)82.99 mph (133.56 km/h)
100 mph (160.93 km/h)87.36 mph (140.59 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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