Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/75r16 vs 225/60r16 Tire Comparison Side By Side
  225/75-16 225/60-16 Difference
Diameter inches (mm) 29.29 (743.9) 26.63 (676.4) -2.66 (-67.5) -9.1%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 92.01 (2337.03) 83.66 (2124.97) -8.35 (-212.06) -9.1%
Sidewall Height inches (mm) 6.64 (168.75) 5.31 (135) -1.33 (-33.75) -20%
Revolutions per mile (km) 688.63 (427.89) 757.35 (470.59) 68.72 (42.7) 10%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.19 mph (29.27 km/h)
25 mph (40.23 km/h)22.73 mph (36.58 km/h)
30 mph (48.28 km/h)27.28 mph (43.9 km/h)
35 mph (56.33 km/h)31.82 mph (51.22 km/h)
40 mph (64.37 km/h)36.37 mph (58.53 km/h)
45 mph (72.42 km/h)40.92 mph (65.85 km/h)
50 mph (80.47 km/h)45.46 mph (73.17 km/h)
55 mph (88.51 km/h)50.01 mph (80.48 km/h)
60 mph (96.56 km/h)54.56 mph (87.8 km/h)
65 mph (104.61 km/h)59.1 mph (95.12 km/h)
70 mph (112.65 km/h)63.65 mph (102.43 km/h)
75 mph (120.7 km/h)68.19 mph (109.75 km/h)
80 mph (128.75 km/h)72.74 mph (117.07 km/h)
85 mph (136.79 km/h)77.29 mph (124.38 km/h)
90 mph (144.84 km/h)81.83 mph (131.7 km/h)
95 mph (152.89 km/h)86.38 mph (139.02 km/h)
100 mph (160.93 km/h)90.93 mph (146.33 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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