Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/55r22 vs 285/45r22 Tire Comparison Side By Side
  315/55-22 285/45-22 Difference
Diameter inches (mm) 35.64 (905.3) 32.1 (815.3) -3.54 (-90) -9.9%
Width inches (mm) 12.4 (315) 11.22 (285) -1.18 (-30) -9.5%
Circum. inches (mm) 111.97 (2844.08) 100.84 (2561.34) -11.13 (-282.74) -9.9%
Sidewall Height inches (mm) 6.82 (173.25) 5.05 (128.25) -1.77 (-45) -26%
Revolutions per mile (km) 565.86 (351.61) 628.32 (390.42) 62.46 (38.81) 11%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.01 mph (28.99 km/h)
25 mph (40.23 km/h)22.51 mph (36.23 km/h)
30 mph (48.28 km/h)27.02 mph (43.48 km/h)
35 mph (56.33 km/h)31.52 mph (50.73 km/h)
40 mph (64.37 km/h)36.02 mph (57.97 km/h)
45 mph (72.42 km/h)40.53 mph (65.22 km/h)
50 mph (80.47 km/h)45.03 mph (72.47 km/h)
55 mph (88.51 km/h)49.53 mph (79.71 km/h)
60 mph (96.56 km/h)54.04 mph (86.96 km/h)
65 mph (104.61 km/h)58.54 mph (94.21 km/h)
70 mph (112.65 km/h)63.04 mph (101.45 km/h)
75 mph (120.7 km/h)67.54 mph (108.7 km/h)
80 mph (128.75 km/h)72.05 mph (115.95 km/h)
85 mph (136.79 km/h)76.55 mph (123.2 km/h)
90 mph (144.84 km/h)81.05 mph (130.44 km/h)
95 mph (152.89 km/h)85.56 mph (137.69 km/h)
100 mph (160.93 km/h)90.06 mph (144.94 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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