Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/50r14 vs 185/60r14 Tire Comparison Side By Side
  195/50-14 185/60-14 Difference
Diameter inches (mm) 21.68 (550.6) 22.74 (577.6) 1.06 (27) 4.9%
Width inches (mm) 7.68 (195) 7.28 (185) -0.39 (-10) -5.1%
Circum. inches (mm) 68.1 (1729.76) 71.44 (1814.58) 3.34 (84.82) 4.9%
Sidewall Height inches (mm) 3.84 (97.5) 4.37 (111) 0.53 (13.5) 13.8%
Revolutions per mile (km) 930.39 (578.11) 886.89 (551.09) -43.49 (-27.02) -4.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.98 mph (33.77 km/h)
25 mph (40.23 km/h)26.23 mph (42.21 km/h)
30 mph (48.28 km/h)31.47 mph (50.65 km/h)
35 mph (56.33 km/h)36.72 mph (59.09 km/h)
40 mph (64.37 km/h)41.96 mph (67.53 km/h)
45 mph (72.42 km/h)47.21 mph (75.97 km/h)
50 mph (80.47 km/h)52.45 mph (84.41 km/h)
55 mph (88.51 km/h)57.7 mph (92.85 km/h)
60 mph (96.56 km/h)62.94 mph (101.3 km/h)
65 mph (104.61 km/h)68.19 mph (109.74 km/h)
70 mph (112.65 km/h)73.43 mph (118.18 km/h)
75 mph (120.7 km/h)78.68 mph (126.62 km/h)
80 mph (128.75 km/h)83.92 mph (135.06 km/h)
85 mph (136.79 km/h)89.17 mph (143.5 km/h)
90 mph (144.84 km/h)94.41 mph (151.94 km/h)
95 mph (152.89 km/h)99.66 mph (160.39 km/h)
100 mph (160.93 km/h)104.9 mph (168.83 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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