Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/70r16 vs 225/60r16 Tire Comparison Side By Side
  225/70-16 225/60-16 Difference
Diameter inches (mm) 28.4 (721.4) 26.63 (676.4) -1.77 (-45) -6.2%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 89.23 (2266.34) 83.66 (2124.97) -5.57 (-141.37) -6.2%
Sidewall Height inches (mm) 6.2 (157.5) 5.31 (135) -0.89 (-22.5) -14.3%
Revolutions per mile (km) 710.11 (441.24) 757.35 (470.59) 47.24 (29.35) 6.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.75 mph (30.18 km/h)
25 mph (40.23 km/h)23.44 mph (37.72 km/h)
30 mph (48.28 km/h)28.13 mph (45.27 km/h)
35 mph (56.33 km/h)32.82 mph (52.81 km/h)
40 mph (64.37 km/h)37.5 mph (60.36 km/h)
45 mph (72.42 km/h)42.19 mph (67.9 km/h)
50 mph (80.47 km/h)46.88 mph (75.45 km/h)
55 mph (88.51 km/h)51.57 mph (82.99 km/h)
60 mph (96.56 km/h)56.26 mph (90.54 km/h)
65 mph (104.61 km/h)60.95 mph (98.08 km/h)
70 mph (112.65 km/h)65.63 mph (105.63 km/h)
75 mph (120.7 km/h)70.32 mph (113.17 km/h)
80 mph (128.75 km/h)75.01 mph (120.72 km/h)
85 mph (136.79 km/h)79.7 mph (128.26 km/h)
90 mph (144.84 km/h)84.39 mph (135.81 km/h)
95 mph (152.89 km/h)89.07 mph (143.35 km/h)
100 mph (160.93 km/h)93.76 mph (150.9 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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