Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/40r22 vs 285/45r22 Tire Comparison Side By Side
  285/40-22 285/45-22 Difference
Diameter inches (mm) 30.98 (786.8) 32.1 (815.3) 1.12 (28.5) 3.6%
Width inches (mm) 11.22 (285) 11.22 (285) 0 (0) 0%
Circum. inches (mm) 97.32 (2471.81) 100.84 (2561.34) 3.53 (89.54) 3.6%
Sidewall Height inches (mm) 4.49 (114) 5.05 (128.25) 0.56 (14.25) 12.5%
Revolutions per mile (km) 651.08 (404.56) 628.32 (390.42) -22.76 (-14.14) -3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.72 mph (33.35 km/h)
25 mph (40.23 km/h)25.91 mph (41.69 km/h)
30 mph (48.28 km/h)31.09 mph (50.03 km/h)
35 mph (56.33 km/h)36.27 mph (58.37 km/h)
40 mph (64.37 km/h)41.45 mph (66.71 km/h)
45 mph (72.42 km/h)46.63 mph (75.04 km/h)
50 mph (80.47 km/h)51.81 mph (83.38 km/h)
55 mph (88.51 km/h)56.99 mph (91.72 km/h)
60 mph (96.56 km/h)62.17 mph (100.06 km/h)
65 mph (104.61 km/h)67.35 mph (108.4 km/h)
70 mph (112.65 km/h)72.54 mph (116.73 km/h)
75 mph (120.7 km/h)77.72 mph (125.07 km/h)
80 mph (128.75 km/h)82.9 mph (133.41 km/h)
85 mph (136.79 km/h)88.08 mph (141.75 km/h)
90 mph (144.84 km/h)93.26 mph (150.09 km/h)
95 mph (152.89 km/h)98.44 mph (158.43 km/h)
100 mph (160.93 km/h)103.62 mph (166.76 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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