Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
200/50r17 vs 120/70r19 Tire Comparison Side By Side
  200/50-17 120/70-19 Difference
Diameter inches (mm) 24.87 (631.8) 25.61 (650.6) 0.74 (18.8) 3%
Width inches (mm) 7.87 (200) 4.72 (120) -3.15 (-80) -40%
Circum. inches (mm) 78.14 (1984.86) 80.47 (2043.92) 2.33 (59.06) 3%
Sidewall Height inches (mm) 3.94 (100) 3.31 (84) -0.63 (-16) -16%
Revolutions per mile (km) 810.81 (503.81) 787.38 (489.25) -23.43 (-14.56) -2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.6 mph (33.14 km/h)
25 mph (40.23 km/h)25.74 mph (41.43 km/h)
30 mph (48.28 km/h)30.89 mph (49.72 km/h)
35 mph (56.33 km/h)36.04 mph (58 km/h)
40 mph (64.37 km/h)41.19 mph (66.29 km/h)
45 mph (72.42 km/h)46.34 mph (74.58 km/h)
50 mph (80.47 km/h)51.49 mph (82.86 km/h)
55 mph (88.51 km/h)56.64 mph (91.15 km/h)
60 mph (96.56 km/h)61.79 mph (99.43 km/h)
65 mph (104.61 km/h)66.93 mph (107.72 km/h)
70 mph (112.65 km/h)72.08 mph (116.01 km/h)
75 mph (120.7 km/h)77.23 mph (124.29 km/h)
80 mph (128.75 km/h)82.38 mph (132.58 km/h)
85 mph (136.79 km/h)87.53 mph (140.86 km/h)
90 mph (144.84 km/h)92.68 mph (149.15 km/h)
95 mph (152.89 km/h)97.83 mph (157.44 km/h)
100 mph (160.93 km/h)102.98 mph (165.72 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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