Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
33/14.5r22 vs 305/50r22 Tire Comparison Side By Side
  33/14.5-22 305/50-22 Difference
Diameter inches (mm) 33.01 (838.48) 34.01 (863.8) 1 (25.32) 3%
Width inches (mm) 14.49 (368) 12.01 (305) -2.48 (-63) -17.1%
Circum. inches (mm) 103.71 (2634.16) 106.84 (2713.71) 3.13 (79.55) 3%
Sidewall Height inches (mm) 5.51 (139.84) 6 (152.5) 0.5 (12.66) 9.1%
Revolutions per mile (km) 610.95 (379.63) 593.04 (368.5) -17.91 (-11.13) -2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.6 mph (33.16 km/h)
25 mph (40.23 km/h)25.75 mph (41.45 km/h)
30 mph (48.28 km/h)30.91 mph (49.74 km/h)
35 mph (56.33 km/h)36.06 mph (58.03 km/h)
40 mph (64.37 km/h)41.21 mph (66.32 km/h)
45 mph (72.42 km/h)46.36 mph (74.61 km/h)
50 mph (80.47 km/h)51.51 mph (82.9 km/h)
55 mph (88.51 km/h)56.66 mph (91.19 km/h)
60 mph (96.56 km/h)61.81 mph (99.48 km/h)
65 mph (104.61 km/h)66.96 mph (107.77 km/h)
70 mph (112.65 km/h)72.11 mph (116.06 km/h)
75 mph (120.7 km/h)77.26 mph (124.35 km/h)
80 mph (128.75 km/h)82.42 mph (132.64 km/h)
85 mph (136.79 km/h)87.57 mph (140.93 km/h)
90 mph (144.84 km/h)92.72 mph (149.22 km/h)
95 mph (152.89 km/h)97.87 mph (157.5 km/h)
100 mph (160.93 km/h)103.02 mph (165.79 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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