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 245/50r13 Tire Comparison Side By Side
  195/50-14 245/50-13 Difference
Diameter inches (mm) 21.68 (550.6) 22.65 (575.2) 0.97 (24.6) 4.5%
Width inches (mm) 7.68 (195) 9.65 (245) 1.97 (50) 25.6%
Circum. inches (mm) 68.1 (1729.76) 71.14 (1807.04) 3.04 (77.28) 4.5%
Sidewall Height inches (mm) 3.84 (97.5) 4.82 (122.5) 0.98 (25) 25.6%
Revolutions per mile (km) 930.39 (578.11) 890.59 (553.39) -39.79 (-24.72) -4.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.89 mph (33.63 km/h)
25 mph (40.23 km/h)26.12 mph (42.03 km/h)
30 mph (48.28 km/h)31.34 mph (50.44 km/h)
35 mph (56.33 km/h)36.56 mph (58.84 km/h)
40 mph (64.37 km/h)41.79 mph (67.25 km/h)
45 mph (72.42 km/h)47.01 mph (75.66 km/h)
50 mph (80.47 km/h)52.23 mph (84.06 km/h)
55 mph (88.51 km/h)57.46 mph (92.47 km/h)
60 mph (96.56 km/h)62.68 mph (100.88 km/h)
65 mph (104.61 km/h)67.9 mph (109.28 km/h)
70 mph (112.65 km/h)73.13 mph (117.69 km/h)
75 mph (120.7 km/h)78.35 mph (126.09 km/h)
80 mph (128.75 km/h)83.57 mph (134.5 km/h)
85 mph (136.79 km/h)88.8 mph (142.91 km/h)
90 mph (144.84 km/h)94.02 mph (151.31 km/h)
95 mph (152.89 km/h)99.24 mph (159.72 km/h)
100 mph (160.93 km/h)104.47 mph (168.13 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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