Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/50r16 vs 225/60r16 Tire Comparison Side By Side
  235/50-16 225/60-16 Difference
Diameter inches (mm) 25.25 (641.4) 26.63 (676.4) 1.38 (35) 5.5%
Width inches (mm) 9.25 (235) 8.86 (225) -0.39 (-10) -4.3%
Circum. inches (mm) 79.33 (2015.02) 83.66 (2124.97) 4.33 (109.96) 5.5%
Sidewall Height inches (mm) 4.63 (117.5) 5.31 (135) 0.69 (17.5) 14.9%
Revolutions per mile (km) 798.67 (496.27) 757.35 (470.59) -41.33 (-25.68) -5.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.09 mph (33.94 km/h)
25 mph (40.23 km/h)26.36 mph (42.43 km/h)
30 mph (48.28 km/h)31.64 mph (50.91 km/h)
35 mph (56.33 km/h)36.91 mph (59.4 km/h)
40 mph (64.37 km/h)42.18 mph (67.89 km/h)
45 mph (72.42 km/h)47.46 mph (76.37 km/h)
50 mph (80.47 km/h)52.73 mph (84.86 km/h)
55 mph (88.51 km/h)58 mph (93.34 km/h)
60 mph (96.56 km/h)63.27 mph (101.83 km/h)
65 mph (104.61 km/h)68.55 mph (110.32 km/h)
70 mph (112.65 km/h)73.82 mph (118.8 km/h)
75 mph (120.7 km/h)79.09 mph (127.29 km/h)
80 mph (128.75 km/h)84.37 mph (135.77 km/h)
85 mph (136.79 km/h)89.64 mph (144.26 km/h)
90 mph (144.84 km/h)94.91 mph (152.74 km/h)
95 mph (152.89 km/h)100.18 mph (161.23 km/h)
100 mph (160.93 km/h)105.46 mph (169.72 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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