Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
200/60r17 vs 120/60r17 Tire Comparison Side By Side
  200/60-17 120/60-17 Difference
Diameter inches (mm) 26.45 (671.8) 22.67 (575.8) -3.78 (-96) -14.3%
Width inches (mm) 7.87 (200) 4.72 (120) -3.15 (-80) -40%
Circum. inches (mm) 83.09 (2110.52) 71.22 (1808.93) -11.87 (-301.59) -14.3%
Sidewall Height inches (mm) 4.72 (120) 2.83 (72) -1.89 (-48) -40%
Revolutions per mile (km) 762.53 (473.82) 889.67 (552.81) 127.13 (79) 16.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.14 mph (27.59 km/h)
25 mph (40.23 km/h)21.43 mph (34.48 km/h)
30 mph (48.28 km/h)25.71 mph (41.38 km/h)
35 mph (56.33 km/h)30 mph (48.28 km/h)
40 mph (64.37 km/h)34.28 mph (55.17 km/h)
45 mph (72.42 km/h)38.57 mph (62.07 km/h)
50 mph (80.47 km/h)42.86 mph (68.97 km/h)
55 mph (88.51 km/h)47.14 mph (75.87 km/h)
60 mph (96.56 km/h)51.43 mph (82.76 km/h)
65 mph (104.61 km/h)55.71 mph (89.66 km/h)
70 mph (112.65 km/h)60 mph (96.56 km/h)
75 mph (120.7 km/h)64.28 mph (103.45 km/h)
80 mph (128.75 km/h)68.57 mph (110.35 km/h)
85 mph (136.79 km/h)72.85 mph (117.25 km/h)
90 mph (144.84 km/h)77.14 mph (124.14 km/h)
95 mph (152.89 km/h)81.42 mph (131.04 km/h)
100 mph (160.93 km/h)85.71 mph (137.94 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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