Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
140/90r16 vs 175/60r16 Tire Comparison Side By Side
  140/90-16 175/60-16 Difference
Diameter inches (mm) 25.92 (658.4) 24.27 (616.4) -1.65 (-42) -6.4%
Width inches (mm) 5.51 (140) 6.89 (175) 1.38 (35) 25%
Circum. inches (mm) 81.43 (2068.42) 76.24 (1936.48) -5.19 (-131.95) -6.4%
Sidewall Height inches (mm) 4.96 (126) 4.13 (105) -0.83 (-21) -16.7%
Revolutions per mile (km) 778.05 (483.46) 831.07 (516.4) 53.01 (32.94) 6.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.72 mph (30.13 km/h)
25 mph (40.23 km/h)23.41 mph (37.67 km/h)
30 mph (48.28 km/h)28.09 mph (45.2 km/h)
35 mph (56.33 km/h)32.77 mph (52.73 km/h)
40 mph (64.37 km/h)37.45 mph (60.27 km/h)
45 mph (72.42 km/h)42.13 mph (67.8 km/h)
50 mph (80.47 km/h)46.81 mph (75.33 km/h)
55 mph (88.51 km/h)51.49 mph (82.87 km/h)
60 mph (96.56 km/h)56.17 mph (90.4 km/h)
65 mph (104.61 km/h)60.85 mph (97.93 km/h)
70 mph (112.65 km/h)65.53 mph (105.47 km/h)
75 mph (120.7 km/h)70.22 mph (113 km/h)
80 mph (128.75 km/h)74.9 mph (120.53 km/h)
85 mph (136.79 km/h)79.58 mph (128.07 km/h)
90 mph (144.84 km/h)84.26 mph (135.6 km/h)
95 mph (152.89 km/h)88.94 mph (143.14 km/h)
100 mph (160.93 km/h)93.62 mph (150.67 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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