Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/25r22 vs 305/60r22 Tire Comparison Side By Side
  315/25-22 305/60-22 Difference
Diameter inches (mm) 28.2 (716.3) 36.41 (924.8) 8.21 (208.5) 29.1%
Width inches (mm) 12.4 (315) 12.01 (305) -0.39 (-10) -3.2%
Circum. inches (mm) 88.6 (2250.32) 114.38 (2905.34) 25.79 (655.02) 29.1%
Sidewall Height inches (mm) 3.1 (78.75) 7.2 (183) 4.1 (104.25) 132.4%
Revolutions per mile (km) 715.16 (444.38) 553.93 (344.19) -161.24 (-100.19) -22.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)25.82 mph (41.56 km/h)
25 mph (40.23 km/h)32.28 mph (51.94 km/h)
30 mph (48.28 km/h)38.73 mph (62.33 km/h)
35 mph (56.33 km/h)45.19 mph (72.72 km/h)
40 mph (64.37 km/h)51.64 mph (83.11 km/h)
45 mph (72.42 km/h)58.1 mph (93.5 km/h)
50 mph (80.47 km/h)64.55 mph (103.89 km/h)
55 mph (88.51 km/h)71.01 mph (114.28 km/h)
60 mph (96.56 km/h)77.46 mph (124.67 km/h)
65 mph (104.61 km/h)83.92 mph (135.06 km/h)
70 mph (112.65 km/h)90.38 mph (145.45 km/h)
75 mph (120.7 km/h)96.83 mph (155.83 km/h)
80 mph (128.75 km/h)103.29 mph (166.22 km/h)
85 mph (136.79 km/h)109.74 mph (176.61 km/h)
90 mph (144.84 km/h)116.2 mph (187 km/h)
95 mph (152.89 km/h)122.65 mph (197.39 km/h)
100 mph (160.93 km/h)129.11 mph (207.78 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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