Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/60r17 vs 225/50r17 Tire Comparison Side By Side
  225/60-17 225/50-17 Difference
Diameter inches (mm) 27.63 (701.8) 25.86 (656.8) -1.77 (-45) -6.4%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 86.8 (2204.77) 81.24 (2063.4) -5.57 (-141.37) -6.4%
Sidewall Height inches (mm) 5.31 (135) 4.43 (112.5) -0.89 (-22.5) -16.7%
Revolutions per mile (km) 729.94 (453.56) 779.95 (484.64) 50.01 (31.08) 6.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.72 mph (30.12 km/h)
25 mph (40.23 km/h)23.4 mph (37.65 km/h)
30 mph (48.28 km/h)28.08 mph (45.18 km/h)
35 mph (56.33 km/h)32.76 mph (52.72 km/h)
40 mph (64.37 km/h)37.44 mph (60.25 km/h)
45 mph (72.42 km/h)42.11 mph (67.78 km/h)
50 mph (80.47 km/h)46.79 mph (75.31 km/h)
55 mph (88.51 km/h)51.47 mph (82.84 km/h)
60 mph (96.56 km/h)56.15 mph (90.37 km/h)
65 mph (104.61 km/h)60.83 mph (97.9 km/h)
70 mph (112.65 km/h)65.51 mph (105.43 km/h)
75 mph (120.7 km/h)70.19 mph (112.96 km/h)
80 mph (128.75 km/h)74.87 mph (120.49 km/h)
85 mph (136.79 km/h)79.55 mph (128.02 km/h)
90 mph (144.84 km/h)84.23 mph (135.55 km/h)
95 mph (152.89 km/h)88.91 mph (143.08 km/h)
100 mph (160.93 km/h)93.59 mph (150.62 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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