Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
200/50r18 vs 210/55r18 Tire Comparison Side By Side
  200/50-18 210/55-18 Difference
Diameter inches (mm) 25.87 (657.2) 27.09 (688.2) 1.22 (31) 4.7%
Width inches (mm) 7.87 (200) 8.27 (210) 0.39 (10) 5%
Circum. inches (mm) 81.29 (2064.65) 85.12 (2162.04) 3.83 (97.39) 4.7%
Sidewall Height inches (mm) 3.94 (100) 4.55 (115.5) 0.61 (15.5) 15.5%
Revolutions per mile (km) 779.47 (484.34) 744.36 (462.52) -35.11 (-21.82) -4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.94 mph (33.71 km/h)
25 mph (40.23 km/h)26.18 mph (42.13 km/h)
30 mph (48.28 km/h)31.42 mph (50.56 km/h)
35 mph (56.33 km/h)36.65 mph (58.98 km/h)
40 mph (64.37 km/h)41.89 mph (67.41 km/h)
45 mph (72.42 km/h)47.12 mph (75.84 km/h)
50 mph (80.47 km/h)52.36 mph (84.26 km/h)
55 mph (88.51 km/h)57.59 mph (92.69 km/h)
60 mph (96.56 km/h)62.83 mph (101.12 km/h)
65 mph (104.61 km/h)68.07 mph (109.54 km/h)
70 mph (112.65 km/h)73.3 mph (117.97 km/h)
75 mph (120.7 km/h)78.54 mph (126.39 km/h)
80 mph (128.75 km/h)83.77 mph (134.82 km/h)
85 mph (136.79 km/h)89.01 mph (143.25 km/h)
90 mph (144.84 km/h)94.25 mph (151.67 km/h)
95 mph (152.89 km/h)99.48 mph (160.1 km/h)
100 mph (160.93 km/h)104.72 mph (168.53 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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