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 225/70r17 Tire Comparison Side By Side
  225/60-16 225/70-17 Difference
Diameter inches (mm) 26.63 (676.4) 29.4 (746.8) 2.77 (70.4) 10.4%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 83.66 (2124.97) 92.37 (2346.14) 8.71 (221.17) 10.4%
Sidewall Height inches (mm) 5.31 (135) 6.2 (157.5) 0.89 (22.5) 16.7%
Revolutions per mile (km) 757.35 (470.59) 685.95 (426.23) -71.39 (-44.36) -9.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.08 mph (35.54 km/h)
25 mph (40.23 km/h)27.6 mph (44.42 km/h)
30 mph (48.28 km/h)33.12 mph (53.31 km/h)
35 mph (56.33 km/h)38.64 mph (62.19 km/h)
40 mph (64.37 km/h)44.16 mph (71.07 km/h)
45 mph (72.42 km/h)49.68 mph (79.96 km/h)
50 mph (80.47 km/h)55.2 mph (88.84 km/h)
55 mph (88.51 km/h)60.72 mph (97.73 km/h)
60 mph (96.56 km/h)66.24 mph (106.61 km/h)
65 mph (104.61 km/h)71.77 mph (115.5 km/h)
70 mph (112.65 km/h)77.29 mph (124.38 km/h)
75 mph (120.7 km/h)82.81 mph (133.26 km/h)
80 mph (128.75 km/h)88.33 mph (142.15 km/h)
85 mph (136.79 km/h)93.85 mph (151.03 km/h)
90 mph (144.84 km/h)99.37 mph (159.92 km/h)
95 mph (152.89 km/h)104.89 mph (168.8 km/h)
100 mph (160.93 km/h)110.41 mph (177.68 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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