Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/55r19 vs 245/50r19 Tire Comparison Side By Side
  225/55-19 245/50-19 Difference
Diameter inches (mm) 28.74 (730.1) 28.65 (727.6) -0.1 (-2.5) -0.3%
Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%
Circum. inches (mm) 90.3 (2293.68) 89.99 (2285.82) -0.31 (-7.85) -0.3%
Sidewall Height inches (mm) 4.87 (123.75) 4.82 (122.5) -0.05 (-1.25) -1%
Revolutions per mile (km) 701.64 (435.98) 704.05 (437.48) 2.41 (1.5) 0.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.93 mph (32.08 km/h)
25 mph (40.23 km/h)24.91 mph (40.1 km/h)
30 mph (48.28 km/h)29.9 mph (48.12 km/h)
35 mph (56.33 km/h)34.88 mph (56.13 km/h)
40 mph (64.37 km/h)39.86 mph (64.15 km/h)
45 mph (72.42 km/h)44.85 mph (72.17 km/h)
50 mph (80.47 km/h)49.83 mph (80.19 km/h)
55 mph (88.51 km/h)54.81 mph (88.21 km/h)
60 mph (96.56 km/h)59.79 mph (96.23 km/h)
65 mph (104.61 km/h)64.78 mph (104.25 km/h)
70 mph (112.65 km/h)69.76 mph (112.27 km/h)
75 mph (120.7 km/h)74.74 mph (120.29 km/h)
80 mph (128.75 km/h)79.73 mph (128.31 km/h)
85 mph (136.79 km/h)84.71 mph (136.33 km/h)
90 mph (144.84 km/h)89.69 mph (144.35 km/h)
95 mph (152.89 km/h)94.67 mph (152.36 km/h)
100 mph (160.93 km/h)99.66 mph (160.38 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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