Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/60r16 vs 205/55r16 Tire Comparison Side By Side
  225/60-16 205/55-16 Difference
Diameter inches (mm) 26.63 (676.4) 24.88 (631.9) -1.75 (-44.5) -6.6%
Width inches (mm) 8.86 (225) 8.07 (205) -0.79 (-20) -8.9%
Circum. inches (mm) 83.66 (2124.97) 78.16 (1985.17) -5.5 (-139.8) -6.6%
Sidewall Height inches (mm) 5.31 (135) 4.44 (112.75) -0.88 (-22.25) -16.5%
Revolutions per mile (km) 757.35 (470.59) 810.68 (503.73) 53.33 (33.14) 7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.68 mph (30.07 km/h)
25 mph (40.23 km/h)23.36 mph (37.59 km/h)
30 mph (48.28 km/h)28.03 mph (45.1 km/h)
35 mph (56.33 km/h)32.7 mph (52.62 km/h)
40 mph (64.37 km/h)37.37 mph (60.14 km/h)
45 mph (72.42 km/h)42.04 mph (67.66 km/h)
50 mph (80.47 km/h)46.71 mph (75.17 km/h)
55 mph (88.51 km/h)51.38 mph (82.69 km/h)
60 mph (96.56 km/h)56.05 mph (90.21 km/h)
65 mph (104.61 km/h)60.72 mph (97.73 km/h)
70 mph (112.65 km/h)65.39 mph (105.24 km/h)
75 mph (120.7 km/h)70.07 mph (112.76 km/h)
80 mph (128.75 km/h)74.74 mph (120.28 km/h)
85 mph (136.79 km/h)79.41 mph (127.79 km/h)
90 mph (144.84 km/h)84.08 mph (135.31 km/h)
95 mph (152.89 km/h)88.75 mph (142.83 km/h)
100 mph (160.93 km/h)93.42 mph (150.35 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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