Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/80r22.5 vs 245/75r22.5 Tire Comparison Side By Side
  225/80-22.5 245/75-22.5 Difference
Diameter inches (mm) 36.67 (931.5) 36.97 (939) 0.3 (7.5) 0.8%
Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%
Circum. inches (mm) 115.21 (2926.39) 116.14 (2949.96) 0.93 (23.56) 0.8%
Sidewall Height inches (mm) 7.09 (180) 7.23 (183.75) 0.15 (3.75) 2.1%
Revolutions per mile (km) 549.94 (341.72) 545.55 (338.99) -4.39 (-2.73) -0.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.16 mph (32.45 km/h)
25 mph (40.23 km/h)25.2 mph (40.56 km/h)
30 mph (48.28 km/h)30.24 mph (48.67 km/h)
35 mph (56.33 km/h)35.28 mph (56.78 km/h)
40 mph (64.37 km/h)40.32 mph (64.89 km/h)
45 mph (72.42 km/h)45.36 mph (73 km/h)
50 mph (80.47 km/h)50.4 mph (81.12 km/h)
55 mph (88.51 km/h)55.44 mph (89.23 km/h)
60 mph (96.56 km/h)60.48 mph (97.34 km/h)
65 mph (104.61 km/h)65.52 mph (105.45 km/h)
70 mph (112.65 km/h)70.56 mph (113.56 km/h)
75 mph (120.7 km/h)75.6 mph (121.67 km/h)
80 mph (128.75 km/h)80.64 mph (129.78 km/h)
85 mph (136.79 km/h)85.68 mph (137.9 km/h)
90 mph (144.84 km/h)90.72 mph (146.01 km/h)
95 mph (152.89 km/h)95.76 mph (154.12 km/h)
100 mph (160.93 km/h)100.81 mph (162.23 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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